Reddit: Affordances as an Enabler for Shifting Loyalties

This paper examines the affordances of Reddit, a digital media platform where Users share and discuss content. The aim of the study was to understand the affordances of Reddit, and how the affordances of Reddit through various features of the platform lead to outcomes, specifically those relating to political loyalty and the creation of political narratives. The study contributes an insight into the evolution and understanding of affordances as a result of examining the ways in which individuals who were previously members of another political group constructed narratives around switching their support to the Trump campaign in the 2016 US presidential elections. The study specifically focusses on an exclusive membership community called r/The_Donald. As a result of analysing posts on common themes using Qualitative Content Analysis (QCA), we conclude that the features enable membership of a community to be rewarded, switched or denied. As a result, this study has identified five affordances of Reddit, which include credibility, expressing oneself freely, echoing beliefs, creating membership and the meta-affordance ‘Redpilling’. The outcomes of these affordances are that ingroups are created, support can be switched, extreme or hateful views are legitimised and a new brand of conservatism is given credibility. This in turn is concluded to have realised impacts outside of the virtual environment in this case on the self-reported behaviours of voters.


Introduction
In this post-truth era of politics, it has increasingly become difficult to distinguish between objective facts and constructed narratives. As Sismondo (2017) argues, US politics has been in the post-truth arena for a long time where echo chambers of both social and older media subsequently lead to the manipulation of voters. Given the increase in usage of digital media platforms, the ways in which people are communicating are varied and continually evolving. This has subsequently led to the construction of affordances. "'Affordance' refers to the perceived and actual properties of a thing, primarily those functional properties that determine just how the thing could possibly be used." (Salomon 1993, p. 51). In other words, these are the uses particular features of objects/technologies afford users. These uses of particular features of technologies enable different forms of communication and self-expression. For instance, Facebook affords its users the indication of their preferences through likes, Twitter does this through retweets. Various studies demonstrate how social media affordances influence how individuals express themselves (see Halpern and Gibbs 2013;Morrison 2014;Fox and Moreland 2015). Relatedly, the influence of affordances of social media on political expression has gained traction (see Christensen 2011;Hapern and Gibbs 2013;Kreiss et al. 2017; Motivated by the importance of affordances, our study focusses on the digital media platform, known as Reddit, as a legitimate data source. We focus on the role of Reddit itself in the social construction of Trumpism by Users of the platform with a particular focus on how affordances of Reddit influence narratives by enabling certain types of self-expression. We are particularly interested in the material affordances of communication (Hutchby 2001b;Markus and Silver 2008) provided to Users i.e. how those Users utilise particular features and settings of the platform in order to construct membership. These constructions of membership were first observed in the Users that appeared to use the platform to justify their support of Donald Trump, the Republican Party candidate after previously being Bernie Sanders, or Democratic Party supporters.
This study contributes to the Information Systems literature by addressing the way in which the construction of membership and resulting behaviour changes that it brings can be mediated by social media, in ways which are not seen outside of these platforms. Using political support expressed during the 2016 USA elections as the source of data, this is of importance because of the potential advantage that it provides when used in the representative democratic process, where influencing and persuasive narratives are key tools for candidates (Bennett 2012). To this end, we particularly explore the concept of affordances to understand the power of the social media platform Reddit and similar sites that enables the construction of membership narratives.
Studies on Facebook and Twitter dominate the studies on social networking platforms (see Huberman et al. 2008;Bollen et al. 2011;Ellison et al. 2007;Pempek et al. 2009), but the Reddit community is relatively under-researched; Bergstrom (2011), Weninger et al. (2013) andDe Choudhury et al. (2014) being notable exceptions. Recently, Buyukozturk et al. (2018) looked at collective identity on a specific subreddit and demonstrated how the social media platform Reddit impacts social movement processes. They specifically looked at Gamergate controversy and studied Gamergate supporters on the subreddit, providing insight into collective identity and membership within a Reddit community.
Reddit is reportedly the 6th most popular website in the world. 1 Registered Reddit community members can submit text posts, links or videos that are discussed by invited or open communities in the subsequent discussion threads. This article has two elementsthe first is examining the affordances of the platform itself, as per the theory of affordances of communication technology developed by Ian Hutchby (2001a, b, c). The theory suggests that media technologies have functional and relational aspects which give opportunities for, or invite, actors to undertake action. (Hutchby 2001a, b, p. 444). The second element is considering how these affordances are used to construct political or membership narratives and recruit members. Reddit was chosen because of its reported influence on voters during the election of Donald Trump as President of the United States and the rise of Trumpism 2 as a whole (Rohlinger and Bunnage 2017).
To this end, two contributions are provided: First, we identify how the affordances of Reddit distinguish it from other social media platforms thereby contributing to the study of Reddit; second, we examine the affordances of Reddit in influencing political narratives.
The paper is organised as follows. We discuss how Reddit is a unique platform, then discuss the theory of affordances which leads us to our research questions. We then provide the method, our findings on the platform and its affordances followed by a discussion of our results in which we focus on the ways in which social media affords a different, and potentially harmful, collection of political narratives than would be voiced in person.

Features of Reddit
Digital media is considered the most complex of media sources due to the nature of internet; i.e. a network of networks (Couldry 2012). However, the materiality of these networks has been overlooked and the focus instead has overwhelmingly been on content or the audiences that consume it (Gillespie et al. 2014). Drawing on Boczkowski and Lievrouw's work (2008), Gillespie et al. (2014) argue that scholars have overlooked the interwoven relationship between the material and the symbolic. In this paper we address this by looking into the materiality of Reddit and its relationship with the way that narratives are constructed by its users.
The content shared on Reddit is diverse, including but not limited to videos, text posts, articles and images. Reddit is organised into categories which are known as subreddits. Users or 'Redditors' as they identify themselves, can submit Posts that may comprise text, a link or an image or video which are then voted and/or commented, on by other members. 'Karma' is a term utilised by Users to refer to points provided to a submitter based on the popularity of a submission. Submissions with the highest votes have the highest 'karma' and rise to the front page and receive more views. The 'karma' rating of any User is found next to their name and can be viewed by any User. It is worth noting that Users can only vote for a post once but they can change their vote once logged. The duration for which a Redditor has been active can also be viewed. These are some of the material features provided to Reddit Users that are not available on other platforms such as Facebook or Twitter.
A User does not require a Reddit account to access the majority of content and, unlike Facebook or Twitter, anonymity (via unvalidated, multiple and easy to start accounts) is allowed for those that do register. Both of these features, while seemingly simple, are of importance because they provide anonymity to the user. Anonymity is one of Reddit's differentiators amongst social media platforms and may be the reason that it is one of the most popular platforms. 3 Accounts do not require personal data and it is considered standard practice to create throwaway accounts whilst posting on sensitive or personal matters. However, as Bergstrom (2011) points out, there is still an expectation of truthfulness amongst community members.
Once a User signs up on Reddit it is possible for them to subscribe to one or more subreddits. Some subreddits are 1 Data from www.Alexa.com. On 28th May 2018 it was the 6th most popular website in the world with Users spending an average of 15 min per day on the site. 2 Trumpism in this paper refers to philosophy and approach espoused by US President Donald Trump and his supporters. exclusive and can be viewed upon invitation only, but the majority are open and usually dedicated to a specific topic within Reddit and allow subscription.

Influence and Persuasion in Social Media: A Review of Existing Studies
A study by Hossain et al. (2018) looks at planned and unplanned behaviour which contributes towards an understanding of why people share political content on social media. Their study sheds light on the cognitive mechanisms that help us understand the reasons why individuals share certain types of content. Through a Goffmanesque lens Richey et al. (2018) examine selfpresentations and increased levels of self-disclosures on social media. They elucidate the existence of a liminal mental state where the differences between formal and informal contexts are minimised and actor's transition from the front stage to the back stage. Therefore, is an array of explanations as to how and why individuals share their views in such spaces and we argue that this is shaped by the affordances of such spaces explained in more detail later in this paper.
The influence of social media can be validated through several noteworthy eventsfor instance, Bonilla and Rosa (2015) shed light on how social media platforms have become influential sites for recording and challenging incidents of police brutality and misrepresentation of racialized bodies in mainstream media by examining the aftermath of the fatal police shooting of an unarmed teenager Michael Brown, in 2014. Through "hashtag activism" social media users were able to show that"#Ferguson is everywhere"-not only in the sense of a broad public sphere but also in the sense of the underlying social and political relationships that haunt the nation as a whole" (p.12). Corroborating the importance of social media in political participation, a study by Tufekci and Wilson (2012) demonstrated that social media, Facebook in particular, greatly increased the odds of participants attending protests in Tahrir square on the first day of the Egyptian Revolution in 2011. Lee et al. (2015) examined the impact of tweet features on the diffusion of two types of messages during the 2013 Boston marathon tragedy. Oh et al. (2015) also examined the role of social media in the Egypt revolution and found that situational awareness was maintained through the use of hashtags. Xenos et al. (2014) found a strong positive relationship between social media use and political engagement among young people in UK, USA and Australia. Grover et al. (2018) investigated whether the nature of social media discussions have an impact on voting behaviour during an election and found that discussions on Twitter could have polarized users significantly. Consequently, as these studies demonstrate that social media influences political participation and social movements, we argue that this influence is facilitated by the affordances that the unique features of the media platform allow.

Affordances
The theory of affordances of communication technology (Hutchby 2001a, b, c) proposes that they are "the functional and relational aspects of media technologies which frame, while not determining, the possibilities of agentic action in relation to an object" (Hutchby 2001a, b, p. 444). The underpinning concept of affordances developed by Gibson (1979Gibson ( , 1982 describes opportunities for, or invitations to, action that 'things' present to actors. Gibson's affordances have three key qualities; they are functional, relational and learned. Hutchby's approach focusses on technological devices as these 'things'. According to Turner (2005) the interpretation of affordances can be divided into simple and complex affordances. The first one relates to the concept of the ideal, proposed by Ilyenkov (1977), as tangibly prevailing in the world in the form of significances shaped by purposeful human activities. Complex affordances relates to Heidegger's phenomenology where context and affordances were seen as synonyms. Similar to the notion of complex affordances, Vyas et al. (2006) propose an understanding of affordances where affordances are socially and culturally constructed and emerge in practices and activities. Seidel et al. (2013) identify functional affordances required in environmental sustainability transformations contributing to a better understanding of IS enabled organisational change; they argue that functional affordances allows us to look at how individuals "interpret material properties of information systems (i.e. technical objects) with the objective of creating more sustainable work practices." (p.1279). The study by Seidel et al. (2013) identifies the pertinent contribution functional affordances can make towards assisting organisations, in this case it is about making a difference through contributing towards environmental sustainability. The authors found that "information systems afforded possibilities for cognitive activities through which individuals across the entire organization could frame, inter-pret, and understand the multilayered and complex issues related to the environmental sustainability transformation"(p.1281). This underscores the importance of Information Systems and affordances in the interpretation and understanding of various issues.
Nevertheless Evans et al. (2017) highlight that there are inconsistencies with the term affordancesthey identify three major inconsistencies. Firstly, scholars describe affordances without engaging in existing research which addresses the same affordance. Second, some studies provide lists of affordances without conceptually defining individual affordances. Finally, affordances are used where they do not meet the commonly accepted definitions of an affordance. We therefore have aimed to address these inconsistencies in this paper. For instance, Majchrzak et al. (2013) in their study, define affordances with a tangible outcome, such as metavoicing, triggered attending, network-informed associating and generative role-takingwhich are closely linked to features in Evans et al's critique (2017) while others use more intangible affordances that are more likely to be perceived by a third party, like Visibility, Editability, Persistence and Association (Treem and Leonardi 2013). It appears that the manner in which each researcher engages with the concept of affordances is different. This is corroborated by Nagy and Neff (2015). Critiquing the traditional concept of affordances, they propose the term "Imagined affordance" to emphasise the importance of imagination in affordances. "Imagined affordances are expectations for technology that are not fully realised in conscious rational knowledge" (p.1). They argue that affordances can include the expectations and views of users even if they are untrue and they should be delineated to include properties of technology imagined by users. This is relevant to our study, as we consider not only the material affordances of Reddit (how the features allow the users to interact with each other) but also the affordances imagined by Reddit users, where they believe that by upvoting a political narrative post, they will be able to influence the views and support of others. For the purpose of this paper, we understand affordances as 'the uses that particular features of an object afford its users, which can be both imagined as well as material affordances'. For instance, the imagined ability for a community to find the so-called suspects of the Boston bombing can be seen as being related to imagined affordances, where the users expressed belief that the thread was able to find the culprit of the tragedy.
Social media platforms are diverse and different in their ability to shape narratives; Halpern and Gibbs (2013) contribute to a greater understanding of social media's impact on deliberation by contrasting social media platforms -Facebook and YouTube which differ in the affordances of identifiability and networked information access. By examining which messages posted by the White House successfully initiated conversations among users, they found that messages in YouTube were considered to be more impolite than messages in Facebook because YouTube is more anonymous, demonstrating the importance of the affordances of communication of a social media platform. The study by Halpern and Gibbs (2013) highlights the importance of recognising the uniqueness in affordances of digital media platforms which subsequently influence narratives. Therefore the way that narratives are constructed on digital media platforms is dependent on their affordances.
Many social media platforms share some features and users, therefore there is necessarily an overlap between the affordances that may be found on each. However, these platforms all exist in a competitive dynamic, where numbers of clicks or time spent exposed to ads or content on the platform is the currency. For these platforms to thrive in this competitive environment they need to differentiate, therefore it makes sense that the unique synthesis of its features and affordances creates that differentiation and in doing so an accepted 'disposition'. This is the first reason why we chose to examine Reddit; it is similar in popularity, shares some features to mainstream rivals Twitter, Facebook, YouTube and Instagram yet invites a completely different use.
The second reason, is that online spaces such as Reddit are particularly relevant in the rise of the alt-right. 4 As Flisfeder (2018) points out, alt-right are seen as dangerous due to the fact that they appear as intellectual and cultured in online spaces, often espousing opinion and bias as fact and are influential as a result. Reddit is an online space where this same principle is able to give power and legitimacy to the online support for the otherwise controversial figure of Donald Trump. Therefore, we look into embodied human practices and interaction involving Reddit, and the affordances it provides to the Users seeking to influence others.
Thirdly, the importance of studying this platform is enhanced because of the risks that are presented by users maliciously using the platform to discredit or sow doubt about individuals or communities. This comes about because users are increasingly exposed to user-generated content that seems as believable as fact-checked journalistic content but with no reliable way of discerning which is true. There are examples of Reddit influencing beliefs and allowing rumours to propagate into credible beliefs. The Boston Bombing incident resulted in users of Reddit groundlessly accusing some individuals which was unsubstantiated, demonstrating the dangers of such a platform. After the Boston bombing thread wrongly named several individuals as suspects, Reddit publically apologised for having fuelled an online witch hunt. This tragedy created a huge amount of traffic on Reddit (about 272,000 people) according to Google Analytics. Therefore, the manner in which narratives are constructed is different in this online space. 5 Several conspiracy theories unique to the platform exist which makes it necessary to consider the impact of such platforms more thoroughly. There used to be a subreddit called r/pizzagate which is now banned; the users of the subreddit claimed that there was a paedophilia ring run by the members of the Democratic National Convention.
While Housley et al. (2017a, b) look into interactions on Twitter using membership categorisation and considering affordances of communication, a detailed exploration of how membership works on Reddit and how this is mediated by the unique portfolio of features and subsequent affordances of Reddit has not previously been examined.
We also examine this process of membership and the manner in which users of a particular subreddit (r/The_Donald) create membership and influence other members in order to create support on otherwise controversial views.
In light of this and the need for further research into the affordances of Reddit, we identified three research questions: 1) What are the features and affordances of Reddit?
2) In what ways do these features and their affordances mediate membership and recruitment behaviours? 3) What is achieved by the use of these affordances?

Research Methods
We examined Reddit posts and subsequent comment threads. Qualitative Content Analysis (QCA) was used to analyse the data. This method systematically describes the meaning of qualitative data (Mayring 2000;Schreier 2012). The focus of QCA is to create a coding frame aimed at reducing the amount of material. This method was chosen as it is highly systematic. Given that Reddit contains millions of posts and comment threads, these had to be sifted through in a systematic manner. The flowchart in Fig. 1 explains the process.
A key feature of QCA is its flexibility in that both concept driven and data driven categories can be utilised (Schreier 2012).
Reddit Users were initially discovered using Reddit's own search function and an online Reddit search engine called RedditCommentSearch.com which allowed a more specific search function. These Users described themselves as former Bernie Sanders or Democratic Party supporters that switched to supporting Donald Trump (in particular, rather than the Republican Party). The Reddit behaviours of these Users were investigated and sub-communities, such as the subreddit called r/The_Donald (a subreddit dedicated to Trump and his supporters) and the 'Bernouts' (an invitation-only group of former Bernie Sanders supporters) were discovered. A search of the content within r/The_Donald subreddit found that a specific identity of such Users was used to refer to Bernie Sanders supporters who switched their support to Trump; these Users called themselves "Afterberners" or "Bernouts". 6 Subsequent searches of Reddit using the term "Afterberners" led to a list of posts by and about AfterBerners. These were then sorted using the site's own function, based on top results which had the most number of upvotes (endorsements by the community of readers). Each link in the first 100 posts was examined, with a specific analysis focusing on Redditors who had mentioned the reasons why they switched their support.
The initial phase of data search comprised searches of the entire site and later on r/The_Donald subreddit, using the terms 'Afterberner' 'Bernout' 'Sanders' 'Bernie' and combinations of these terms. Posts and Users were included in the data where Users referred to previously being supporters, identified with Bernouts or Afterberners (either using these terms to describe themselves, or through describing behaviour as such) and stating or describing support for Donald Trump. This initial examination of the data comprised posts and their subsequent replies.
The original posts by Redditors who either described themselves as Afterberners or Bernouts, or could be described as such by the statements they made and the responses to those posts were grouped under broad themes. As we were interested in interactions between Redditors, the replies to each post were also analysed.
After this initial phase of inquiry, content analysis was undertaken. All posts were coded and an initial coding frame was developed as shown below. 7 -Features and Affordances (see results in 6.1) -Switching support -Bernie Sanders (see results in 6.2.1 and 6.2.2) -Hillary Clinton (see results in 6.2.3) -LGBT (See results in 6.2.4) -Social justice warriors (See results in 6.2.5) -Russian Involvement (See results in 6.2.6) -Social Construction (see results in 6.3) Subsequent analysis of these codes was undertaken to determine the main points of narrative that Redditors used to construct their and Trump's legitimacy and sense of community identity. Second stage analysis sought to identify the ways in which in-group language or codes were used to display membership. All data is in the public realm, all contributors are anonymous and no effort has been made to identify or provide identifying characteristics.
A final analysis was undertaken in the light of other social media platforms. In particular, the online dialogue about Donald Trump on Twitter was examined for comparison.

Building a Glossary
To understand how social construction worked in Reddit, we had to first translate or interpret some of the language used. As part of our reflexive discussions, we recognised that we represented an outgroup; language was used in a way that was unfamiliar to us at the outset. It was clear to see that the use of in-group language was highly prevalent. To memorialise this insight, a glossary of terms was developed (see Appendix 1 Table 3) which is a useful resource for those not familiar with the language used in r/The_Donald.

Self-Censorship and Researcher Reflexivity
Given the provocative nature of the content of the data, we would like to acknowledge that there were a few topics that we actively did not pursue. These include views on Islam and controversial conspiracy theories surrounding paedophilia and the Democratic National Convention. Given that we were dealing with controversial content, it was essential for us to be aware of our own biases during the data collection, coding and analysis process. Due to the interpretive nature of our research, we acknowledge that it is unrealistic to fully remove ourselves from the data collection processes. Failing to take into account the place of researchers in the construction of meanings removes the researcher from the processes and allows them to make assertions on the role of others which unfortunately brings a "static understanding to meanings that are inherently fluid in nature" (Alvesson and Skoldberg 2000;Easterby-Smith et al. 2015, p.181). We were both aware of our positions. One of us is an experienced User of Reddit, more neutral in political views towards Trump and the other was new to Reddit and identified with the left-leaning more than with right wing politics. The potential effects this could have on the research process were discussed. To minimise the influence of the researchers on the research process, coding and analysis were carried out by both researchers and frequent discussions about potential bias took place. Furthermore, our study is focused on the affordances of Reddit and not on Users' individual dispositions. Therefore the extent to which Reddit itself influenced narratives was of utmost importance, rather than the content of the narratives.

Findings
The findings of the study are presented below in four areas: Initially those that relate specifically to "how features are utilised as affordances by Users of Reddit" (section 6.1); followed by "how these affordances are specifically used to create or maintain support around specific themes" (6.2); and, in doing so, socially construct in-groups and outgroups (6.3). Finally the findings compare the use and interactions afforded on Reddit with those seen on Twitter (6.4).

Features and Affordances of the Reddit Platform
This section describes the features and the resultant affordances of Reddit as a platform and how they are used Fig. 1 Flowchart showing the systematic method for data capture and analysis constructed for this study by Redditors to enable membership and recruitment. A summary of the findings is located in Table 1.

Affording Credibility and Approval through Registration, Data Sharing and Posting/Rating Features
Feature 1: Registration. Registering to create an account allows Users to be able to rate posts, post content, and respond to posts. Therefore, whilst registration is not required to view content, it is necessary to allow participation on Reddit. Whilst posting, the Users also agree to adhere to the rules of the platform as a whole, or they risk having their posts removed. The information associated with an account enables others users to see how long an individual has been active on Reddit and the 'Karma' that the account has earned (Fig. 2).
There is no verification process for setting up an account which enables users to create personas that may not reflect reality (see also 6.1.5 Freedom of Expression) and in doing so have a clean slate from which to build or join communities. If users find that their shared content or views do not achieve their goals, or attract the desired group or support, a new account creates a blank persona from which to garner support or engage with a community. Despite the lack of verification, the history of an account, and the number of upvotes carries weight, as users are able to check the profiles of other users to learn about their history on reddit, giving some indication of the credibility of users.
Feature 2: Posting/rating enabling interaction with user content and data sharing. When content is posted in a particular subreddit, there are various ways through which Users can engage with it. Redditors are able to upvote or downvote the post and reply with comments to the post (see Fig. 3) if they have an account. Additionally, other Redditors can reply to comments resulting in a comment thread. Some posts are marked "Serious" which means any humour or inappropriate comments will be removed and the net sum of the number of upvotes (+1) and downvotes (−1) is given to the left of a post. The feature itself is a simple calculation shown clearly next to a post but the affordance of this is that it provides the reader with another proxy for credibility. Posts with a high upvote score afford a level of confidence and reassurance that liking the posts will allow them to be part of that majority. Posts that have large numbers of net upvotes are promoted higher into list of posts available to view and are more likely to be upvoted as a result, creating a snowball effect. Upvotes for original posts contribute towards the karma that a particular user accumulates. The longer the history of an account, and greater the number of original post and upvotes, the greater the karma. This is explained in more detail below.
Drawing on Gibson's (1977) conceptualisation of affordances, we therefore suggest that registration, interaction with user content, data sharing and the karma afford credibility to posts and users. Credibility has not been identified as an affordance in many research articleshowever Sundar (2007) describes credibility as being made of 4 affordancesmodality, agency, interactivity and navigability (the MAIN model). This definition has been used to assess the credibility affordance in this case. The modality, Reddit itself, adds the heuristic of 'authority' due to its size, reported user numbers and familiar format. Agency is afforded because otherwise anonymous users are attributed as 'sources' of information, opinion or thought.
Because user accounts accrue data which is publically available when the user posts, this allows users to build their perceived credibility -'Karma' is accrued every time a post that they make is upvoted and so users with high karma scores are instantly recognisable as having views and creating content that is liked often and by many. This will affect how a User is perceived by others in interaction and plays a role in how membership takes place. Karma is considered an important badge for Reddit users especially as some subreddit moderators automatically delete posts from users with low Karma. As a result subreddits such as r/free_karma and r/FreeKarma4You have thriving communities of users who promise to upvote each other in order to build this proxy credibility. The accrual of karma by these individuals provides a halo bias to the posts that they have created or publically shown approval for. This matches with Sundar and Nass's (2001) report that stories attributed to other users are likely to be perceived as higher quality.
The posts are interactive through the effect that up-and down-voting and karma has on the algorithm which rates and orders posts for visibility. These afford the interaction herustic, leading to greater specificity of the content that is seen according to the likes (or dislikes) of the user. These, coupled with the ability to receive regular notifications through the mobile app, encourage increased interaction and participation means that almost "everything that they consume online is a product of their interaction with the medium" (Sundar 2007), which in turn makes the content appear credible, because it agrees with their world view.
Navigability is easy for the user, because the platform uses familiar formats and interfaces to other social media and operating system platforms providing the final layer of credibility through well established familiarity heuristics (this looks familiar to other credible sites or imagery that I'm used to, I know where to find what I need, therefore it must be a credible site).

Affording Belonging and Membership through Features that Make Visible the Artefacts of Culture
Feature 1: Personalisation. The Reddit allows a high level of personalisation of the way that the platform looks for sub-Reddits. An example of this is the way in which images of Donald Trump are regularly updated on the front page and surrounding wallpaper of the r/The_Donald. These are often tied directly to the most popular news stories of the day. a. The lack of verification in the registration process allows users whose views or comments have led them to be shunned or downvoted in the subreddit to create new personas that they can manipulate in order to either test controversial views, or to fit in with the crowd in order to become influential. b.Karma rating shows activity on Reddit and provides the otherwise anonymous users a proxy for credibility. This adds to the perceived legitimacy of the message and infers to readers that they are reading a majority viewpoint, when this may not be the case. a. The use of unique language, particularly codes, allows membership messages to subtly be reinforced. This feeling of membership and in particular of belonging is one of the rewards conferred on members and is earned by keeping up to date with the new language. b. Membership language also excludes those who do not share the same views, culture or experience creating a strong in-group/ outgroup differential and again prevents alternative views being expressed. This is further expected by rules which exclude opposing views.
c. Echoing 1. Deport option a. Part of the personalisation -the 'Report' button is changed to 'Deport' a subtle reminder of Trumps stance on illegal or unwanted immigration and an affordance that reinforces the message and its acceptability every time it is used.

Rules for Excluding alternative rules
a. Introductory matter and the particular rules of every sub-Reddit provide guidance on the expected behaviour for that community. In particular, it is for support and praise of Donald Trump and in so being, provides an echo chamber for those wanting to strengthen their views and seek messages they can proliferate outside of the community. b. Third party moderation actively enforces these rules of communication and is expected and welcomed by users. c. In r/The_Donald the rules are explicit about the site being supportive of Trump and only for that purpose. Critical views or debate are neither encouraged nor tolerated and this provides a place for views in support of Trump to become extreme in their expression.
d. Expressing oneself freely 1. Anonymity a. Anonymity allows otherwise controversial matter to be raised openly within the rules of the sub-Reddit -allowing a persona that may not be acceptable in the 'real' world to be expressed, often in-extremis, with no perceived danger to the user of real world consequences. b. Throwaway accounts allow multiple personas to be presented by the same individual allowing and creating an expectation of, edited self-expression specific to the community on that sub-Reddit.
On 17th April 2018 the front page held an image which included American patriotism images alongside the Make America Great Again campaign baseball caps. At 8 am EST that image was changed to one of Donald Trump being presented with a rose by Kim Jong Un of North Korea to reflect news that North and South Korea had reached a peace accord. The first two posts on r/The_Donald that day were from Redditors on r/The_Donald stating that this event was as a result of Donald Trump's stance. 8 Examples of this and other front page matter are found in Fig. 4.
Every sub-Reddit can be personalised to create a local virtual environment which Users are familiar with. This is clear on r/TheDonald where imagery of Trump, far left supporters and Trump as various heroic figures is common. Even within the tools of Reddit, r/TheDonald has been personalised to reflect the culture. The 'Report' link (available to Users under every comment on the wider platform) has been replaced with 'Deport' reflecting Trump's election campaign promise to reduce the number of illegal immigrants in the USA.
The usual options are found in Fig. 5, an example about Jeb Bush from r/OutOfTheLoop with the modified version from r/The_Donald underneath.
The affordance of this highly personalisable space goes beyond the credibility that it provides in the 'Navigability' and 'Familiarity' domains, but goes so far as to create a feeling of membership in the user. The creators and authors of the subreddit are able to show their affiliation as soon as visitor reaches the site. Little has been found in the literature to support this view of 'affiliation' as an affordance of communications technologies. It is more established in the field of 'spatial affordances' from ecological psychology Bloomfield et al. 2010). The work of Bateman (2011) is an example which looked at the ways in which the acceptance of 'moral rules' in the playground was used by children to show affiliation with a group category and therefore demonstrate membership. However it is a clear and obvious finding of this study that affiliation, joining and the membership inherent in that act is an affordance that should be included in the lexicon for social media affordances.
Feature 2: Encoding (Use of codes and ingroup language). Language, and in particular encoded language, was identified as an important feature within r/The_Donald. The use of a unique language on Reddit affords users the ability to maintain membership. The following example is discussed to emphasise the importance of in-group language in the affordance of membership. 9 Comments: In this example from the 6th January 2018, Users are discussing Donald Trump's Tweets from that day in response to the recent release of the book "Fire and Fury: Inside the Trump White House" by Michael Wolff. The initial responses express their support for Donald Trump's response, showing that they think it is funny and meant to be funny, using the ingroup code 'MSM' to describe mainstream media and the derogatory term MSM kittiessuggesting that they are naïvely led around by Trump's Tweets like a kitten chasing a laser pen dot. u/E….e's support is couched in familiarity 'GEOTUS is like "hold my beer" lol'. This might be a nonsensical statement to any but the in-group. GEOTUS being one of many aliases used for Donald Trump on r/The_Donald and 'hold my beer' suggesting that Trump is going to get something done quickly (see Appendix A Glossary for further disambiguation).
They way in which Reddit differs from traditional message board format is that the Users do not engage in discourseoften making only one comment per thread as would be the norm for Facebook or Twitter. Rarely does a Redditor appear more than once in reply to a post or in defence of their own comment.
The language used suggests that the followers are constructing justification for what, at first glance, appears to be defensive language in Trump's tweets.

Affording the Echo Chamber through Features that Exclude Alternative Views
Feature 1: The deport option. This was discussed as part of personalisation where the "deport" option instead of the "report" option in the r/The_Donald affords the Users the echo chamber as seen in figure 5.
Feature 2: Rules for excluding alternative views. One of the most obvious affordances noted when studying what influenced apparent membership and recruitment on r/The_Donald was the exclusion of alternative views, which the features of the introductory matter on the front page and the particular rules of every subreddit allow. Examples from r/The_Donald are shown in Figs. 6 and 7. The introductory material and the rules enable the affordance of 'echoing'. Here, the community sets out its agenda and the community's culture.
Reddit Users who have subscribed (and are therefore able to post content) are asked to abide by a common set of rules, whilst more localised rules for subreddits can also be added by moderators. In r/The_Donald, three additional rules are added, requiring that 'Trump Supporters Only' use the thread, that the subreddit is not to be used to make threats to Government officials (which is illegal in the USA) and suggested behaviour outside r/The_Donald.
As shown in Fig. 7, the key matter relating to membership is 'This forum is for Trump supporters only'. The explanatory text goes on to state 'If you have questions about our president, our way of thinking or other discussion questions post them on Reddit.com/r/AskThe_Donald where we will gladly answer. This forum is NOT for that'.
The unwritten rules of Reddit users (known as 'Reddiquette') 10 suggests that the community is a discrete, selfregulating culture. Cultural norms for Reddit as a whole include the concentration on 'conversation' promoting content and 10 https://www.reddithelp.com/en/categories/Reddit-101/Reddit-basics/ reddiquette Fig. 2 Example of a user profile showing the Karma rating discussion pointsthe insistence that posts and titles should not be opinionated or recruitment oriented but that posts should be factual (such as pointing others towards media/news etc.) and that opinions should be limited to the comments reinforce this.
While most subreddits are openly accessible if you are not subscribed to them, or logged into Reddit, you cannot submit posts without being logged in. Further if you are subscribed to a subreddit this will show up on your front page, with the highest rated posts from those subreddits available to view on the home page. The score for a post or comment is dependent on the number of upvotes and downvotes. 11 This automated regulation means that Users visiting interest groups like r/The_Donald will only be exposed to posts that reflect the common interest and experience very few dissenting voices in doing so. This is in addition to sub-Reddit moderation and allows and maintains the 'membership' element to the point of it becoming an echo chamber, or political homophily (Colleoni et al. 2014) for support of the community's common interest (in this case, Donald Trump).
Closed membership, and the echo-chamber effects observed, occur because of the features of Reddit which allows subreddit moderators to delete the content of users who they perceive are not supportive of the rules, in this instance, any negative comments or questions about Donald Trump. Hence, the features of Reddit and in particular r/The_Donald, are actively used to exclude alternative views.
We have labelled the affordance that arises from this feature as 'echoing', taken from the commonly used term of the 'echo chamber'. Echo chambers are not new in the world of communications affordances. Vaccari et al. (2016) are amongst the most recent to identify the way in which users who communicate about politics (in this case elections) were more likely to do so in networks that support, rather than challenge, their views. While Vaccari et al. (2016) recognise that recent research has shown that the internet can function as an echo chamber, their own research discovered that the extent to which social media functions as an echo chamber depends on the individual, who may also use social media as 'contrarian clubs' where political disagreement is common.
The post shown in Figure (MSM Kitties) illustrates the way in which Reddit differs to other social media platforms: this thread and its comments features no anti-Trump sentiment at all. In open feeds that don't have a specialist membership, such as Twitter, responses that are openly supportive of a particular stance (either for or against Trump) often have a more balanced set of subsequent responses. Trump's own official Twitter feed contains comments that are openly in opposition to his views, more closely demonstrating the Contrarian club as described by Vaccari et al. (2016). r/The_Donald is clearly an echochamber by comparison. Three potential causes for this on Reddit have been identified: either negative responses are moderated and deleted (Feature 1 -Rules) negative responses are quickly downvoted and the thread disappears (Feature 1 -Registration, Rating, upvoting), or there is a culture that non-Trump Supporters wouldn't read or respond to threads in r/The_Donaldpolitical homophily (Barberá 2015) according to Vaccari's model. Whatever the cause, the result is a safe place for supportive voices to thrive with no fear of dissent.
In the case r/The_Donald, we suggest that the format of Reddit is consistent in its affordance of an echo-chamber through its explicit rules and the tacit use of language, personalisation and reinforcement of membership in the comments and their subsequent ratings.

Expressing oneself Freely as an Affordance of the Feature of Anonymity and Throwaway Accounts
Feature 1: Anonymity. As shown in 6.1.1, Reddit has no verification process for setting up an account, users can create personas that may not reflect reality and in doing have a clean slate from which to build or join communities. The fact that 11 https://www.reddithelp.com/en/categories/Reddit-101/Reddit-basics/howposts-or-comments-score-determined Reddit affords its Users to express themselves freely through anonymity differentiates it from other platforms such as Facebook or Twitter. Anonymity is embraced and encouraged on Reddit and enables Users to open up more. Figure 8 is a screen shot of an example of how throwaway accounts are often used in order to remain anonymous. The post says "throwaway obviously" to indicate that they don't want anyone to figure out their identity.
Anonymity is a well-established affordance of communications technologies, having been used by Evans et al. (2017) as an example of a topic that meets the threshold criteria of such. We argue that the affordance in this case is the freedom of selfexpression that anonymity allows, rather than just being anonymous. What appears at odds with this otherwise obvious finding, is that anonymity in other social media undermines the affordance of credibility, under the 'Agency' heading of the MAIN model (Sundar 2007). Having shown that an otherwise anonymous source is afforded credibility on Reddit because of the features of rating and Karma (see 6.1.1) it leads to two observations: 1 There is an unmet need for self-expression outside of the platform that this anonymity affords, 2. There is an acceptance that Reddit is a place where controversial views and opinions which wouldn't otherwise be acceptable in a less controlled environment are allowed and welcomed.
In summary, four major affordances have been identified in this study: Credibility, Creating membership, Echoing and Expressing oneself freely. Table 1 shows how the affordances and the features from which they arise are used within r/The_Donald.
Using the test of the threshold criteria of affordances (from Evans et al. 2017) an affordance has reached the threshold if it is not the object, or a feature, or an outcome but does have a variable effect. We argue that all of the above meet these threshold criteria, where Reddit is the object, the features are clearly identified in section 6.1 and the outcomes are shown below in section 6.2).

Applying Features and Affordances to Switching Support (Outcomes of the Features and Affordances)
This section uses examples taken directly from Reddit to illustrate the ways in which the features and affordances have been utilised alongside persuasive, rewarding or other tools of social constructionin this case to achieve the outcome of garnering or maintain support for Donald Trump. This section also explores the creation of other affordances such as Redpilling which is related to belonging and membership. Comments below the post: Example 6.2.1 is a post by a former Bernie Sanders supporter (an 'Afterberner') who switched to supporting Trump, but did not vote. By referring to Trump as the "God emperor", u/f...FL expresses support for Trump. A series of links are posted which show Trump in good light .
By posting in favour of Trump,u/f…FL gains membership into this community (r/The_Donald). This is demonstrated by replies to the post. For instance, u/T…s encourages everyone to upvote this submission. By saying "let's vote this baby higher", the User is using the affordances of Reddit to highlight this particular post he/she agrees with. As Reddit allows Users to upvote or downvote posts and comments, the most upvoted comments and posts get more visibility. Subsequently, the post became the highly rated and prominent within r/The_Donald, featuring on the front page.
u/N….n also responds to the comment to show support for the original post and express their support for Trump by using his campaign slogan Make America Great Again as the abbreviation MAGA. Abbreviations are another aspect of Reddit, as Users often utilise them as an 'in-term' creating a private lexicon of membership and assuming knowledge of them in other Users, which is different to non-membership interactions. See section 6.3 for more on this.

Redpilling as a Meta-Affordance
The term 'Redpilling' was frequently found in the sample of posts analysed and often used with significance as a call to action by Users. Redpill is a slang term which refers to the scene in the film 'The Matrix' where Neo takes the red pill and sees things 'as they really are' (see Glossary for details). The term has been appropriated by different groups. For Trump supporters it is a call to 'see the world as it really is', although it has also been suggested to have a darker connotation when alt-right individuals use itconsidered to mean "convince other white people that we're better than others" and many of them are not shy about trying to redpill their friends and families (Pearl, 2016). Redpilling on r/The_Donald took the form of being an ingroup code, a subject of discussion, a call to action or a mission to be rewarded for achieving. In this research it also arose as a type of 'meta-affordance' (Poddiakov 2018) which flows from the other affordances provided by the various features of Reddit. The combination of the rules of the community, personalisation and exclusion of alternative views allowing for membership and belonging, credibility and echoing leads to 'Redpilling'; the phenomenon of believing that you have seen a truth which the social masses are blind to. Members of the community are able to Redpill each other. Because of the lack of dissenting voices, the rewards offered for Redpilling or being redpilled (such as Karma, upvotes or gold) and the associated feeling of belonging that this engenders.
Here, red pilling (or Redpilling) is a call to action and u/d….d appears to equate the switch from Democrat to Republican as redpilling, mixed in with emotions around identity as an American and the virtues of love, life and liberty. Various comments are posted by individuals who related to this. Consequently, u/d….d gains membership into the community by explaining why he/she switched support through a critique of socialism.
Several Users express criticisms on socialism and relate it to apathy. Trump being president is equated to freedom. u/L….5 suggests that he/she is from a third world country and supporting Trump gives the User legitimacy, as Trump was seen as being unsupportive of immigrants. However it can be argued that u/L….5 is seeking to preserve their relative power by subscribing to Trump's anti-immigrant sentiments which this embrace of conservatism provides. Similarly u/e…. s mentions the mass causalities amongst white males and points out that male refugees take their place instead. Again, the need to preserve the power of an in-group such as "white males" can be observed. Reddit provides a platform for such expression which would be controversial elsewhere.
The four clear affordances identified from the features in section 6.1; credibility, creating membership, echoing, and expressing oneself freely, have all passed the test of an affordance in that they are neither the feature nor the object, they lead to an outcome (but are not the outcome) and that this outcome may be variable. The fifth affordance, Redpilling, is less clear cut. It is more accurately a meta-affordance of the others and needs to be identified as such, raising questions over whether a meta-affordance is in fact an outcome or a 'pre-outcome'. Having been 'redpilled' by others, users have passed a rite of passage for the community and are clear advocates for the cause.

Alleged pro-Hillary Propaganda and Switching
Example 6.2.3 Original Post. 14 Comments This comment was made in response to a post about switching from Stein to Trump due to social media bans. u/T….1 alludes to aspects such as media bias against Bernie Sanders and Trump, as well as election irregularities that were ignored. One reason cited by the User relates to Sanders not turning against the Democratic Party at the Democratic National Convention (DNC) leading to a loss of support for Sanders. u/T….1 identifies as a progressive and expresses that Trump is a better alternative to Hillary. Therefore, one of the reasons for voting Trump seems to be the dislike for Hillary Clinton. Again key acronyms (TPP and DNC) are used which are current and available to Trump supporters but may be seen as part of the membership lexicon.
U/R….f asks u/T….1 to not be so harsh (on themselves), as people need to be persuaded to support Trump. As being amicable would attract more members into the community this is likely a preferred strategy. The manner in which posts are responded to could also mediate the manner in which interaction unfolds on Reddit.

LGBT Community
The following original post about the LGBT community highlights how a section of the LGBT community find Trump supporters to be more welcoming.
Example 6.2.4 15 A common theme in our preliminary search of the data was responses from the LGBT community. Several Users claimed that they supported Trump. u/S….r expresses that r/The_Donald is more welcoming than the LGBT subreddit.
Here the User had a Canada flag next to his Username and expresses gratitude towards the r/The_Donald subreddit for making them feel welcome and despite being Canadian expresses support for Trump. u/[−]F….R reinforces this idea by pointing out that r/The_ Donald doesn't discriminate based on sexual preference, race, ethnicity but focusses on "righteousness, individual liberty and justice". A dialectical relationship between the extreme right and left liberal values can be observed here. However, other Users provide support to the original poster by encouraging him/her and reassuring the original Redditor that the subreddit is a welcoming community. This statement is in opposition to the clear and visible rules of the subreddit which do not welcome those who wish to question Trump, but the affordance of echoing provided by those same Rules mean that it is not questioned.

Anti-SJW Liberal Sentiment
Example 6.2.5 -Original post 16 Replies to post.
Social justice warriors (SJWs) is one of the themes that came up during our preliminary search of the data into switching support. SJWs refer to individuals who are far left leaning or third wave feminists. The term SJW seems to have originated on Tumblr which is a microblogging platform. 17 The original post is accompanied by an image of a female high school student wearing a MAGA t-shirt on "America day" at her high school expressing openly her patriotism and displaying love for her country. In her original post, she points out how her teachers and peers are SJWs.
SJWs are disliked by Trump supporters (who are largely conservative) because SJWs are seen as being far removed from traditions and values what conservatives uphold. The very first comment is posted by her father who expresses pride in his daughter as she exhibits patriotism. Criticisms of what has now happened to America is expressed. u/D….o excludes himself from the "dysfunctional" and "depraved" society. A differentiation is created between the in-group and the out group where the out group in this instance are the SJWs who are dehumanised through various criticisms directed towards them.
The post by the original poster u/N….p gives u/D….o legitimacy by confirming that she is indeed his daughter. What follows are several compliments from other Users. u/D….o's parenting is being applauded.
The fact that u/N….p was able to confirm the relationship with u/D….o gives this thread more credibility and other Users seem to be responding to the fact that they are related. There is no evidence that this is actually the case but it is accepted as fact because it has been written on the thread by users with good karma, further evidencing the credibility affordance that is provided by Reddit.

Russian Involvement
In response to allegations of Russian propaganda on Reddit, a message was posted by Reddit. The message highlights that accounts that are linked to direct propaganda are being removed and that Reddit is doing their best to ensure that this happens.
We looked at the comment thread where interaction between a Reddit representative and Users took place which links directly to the affordances of Reddit.
Example 6.2.6 Original comments found under an official announcement by Reddit relating to Russian Propaganda. 18 The first response to this message by u/UntestedShuttle criticises u/Spez (Reddit representative) by highlighting how animal torture, images of dead babies and corpses still frequently appear on Reddit. This incident of the Users engaging with and questioning the media itself highlighted the credibility affordance provided to them, This post evidenced the fact that although Reddit is a media platform, it is still being run by people who have the power to control the interactions and content on Reddit itself. By controlling and looking out for Russian propaganda, Reddit reinforces its credibility through three aspects of the MAIN model (Sundar 2007): the modality of the moderated platform), the Fig. 8 Anonymity through throwaway accounts agency of its moderators, and the interactivity in that those moderators can be questioned. While the features claim to prevent propaganda messages, or bots from trying to influence narratives the affordances in doing so this further reinforces the messages of credibility and, to some extent, membership in that those potential propaganda messages are also excluded.
Summary Table 2 shows a summary the affordances most used in threads that seek, recruit or otherwise create an ingroup/outgroup differential in support of Trump. A tick mark indicates that a particular affordance played an important role in shaping that narrative.

Social Construction
As has been described in section 6.1, each sub-Reddit is highly customisable. On the front page alone two boxes that are plain links in other subreddits; 'submit a link' and 'submit a text post', have been customised with scroll over images. The button that allows you to submit a link has a roll over text that shows the phrase 'No cucks allowed!' over an image of Bernie Sanders and 'submit a text post' button has a roll-over image which says 'post only if you support President Trump!' Posts that had been themed for social construction and identifying affordances that allowed it were also used to explore how feelings of membership and the in-group were enabled. This was most clearly achieved through coded and self-referential language. As an example, the post submitted in January 2018 by u/jamesvien which starts 'Wakey Wakey Pedes,' (shown in Fig. 8) acts as a microcosm for much of the self-referential language. Findings from this post took two formsa growing glossary of in-group terms and phrases which are not in popular use outside of Trump related media (see appendix), as well as the analysis of the post's content. In every post in the subreddit, users exclude those from the outgroup by using language that they will not understand. This wouldn't work to the same extent in a more open, less member oriented platform such as Twitter or Facebook, where the audience for any post may be more diverse. While each individual User's post has little meaning or significance, each thread as a whole shows the way in which this coded language can generate responses from the in-group, reinforces membership and is used to express public support for statements or behaviours described as controversial or negative in other lights.

Reddit in Comparison to Other Social Media, as an Illustration of the Differences Afforded by Features
While 4chan and 8chan are similar to Reddit in terms of their features, platforms such as Twitter and Facebook differ from Reddit. 8chan is extremely controversial due to its involvement in perpetuating illegal activities such as child pornography, and enabling mass shootings. 19 While 8chan is seen as a toxic, dark place, Reddit does not have the same noxious reputation. One of the main differences between 4chan and Reddit is that 4chan is a registration free site, whilst Reddit requires an account to be able to participate.
Reddit is therefore in a liminal space in terms of being popular and niche and the same time, where aspects of it make it niche, but it is also relatively well known.
While r/The_Donald subreddit is used for supporters of Trump with no alternative views to Pro Trump views, #Trump on Twitter gets used by people with both positive and negatives views on Trump. The image below is a screenshot of #Trump where both posts shown seem critical of Trump (Fig. 9).
Twitter users, whilst expressing opinions on Trump, seem to directly address it to him via @realDonaldTrump as shown in Fig. 10 and these can be both positive and negative. This mode of engagement is different to that of Reddit, where (in the case of r/The_Donald), an echo chamber was created but with no direct interaction with the object of that interaction. Twitter is used by people to publicly express their opinions whilst attaching their name and other identifiers to it. Moreover, in order to access a lot of the material on Twitter, a verified (and presumably non-anonymous) account is essential, whereas on Reddit most content can be accessed without an account.
While a complete comparison of the features of the various popular social media platforms is beyond the scope of this study, it is essential to recognise the differences in digital media platforms, as obtaining an insight into these differences in user engagement contributes to a better understanding of the social media literature.

How Affordances Relate to Membership on Reddit
Our study has set out to understand how the features and affordances of Reddit mediate membership and recruitment behaviours and to understand what is achieved as a result.
In the first instance, it is important to identify that some affordances of Reddit are potentially unique to the platform because of the combination of features that enable them. The role of the reputation of Reddit as an intellectual space and a trusted medium means that it is unlikely that the same features on another platform would offer the same affordances or enable the same effect.
As well as investigating how the affordances of Reddit enabled the construction of a membership community around a common cause (in this case Trumpism) the other intention of the research was to explore the ways in which the Redditors used these affordances to maintain their own membership of the political 'in-group' and recruit others to it, thereby influencing the democratic process.
We have shown how affordances of Reddit have evolved from the features and functionalities provided on the platform and how these, in turn, lead to outcomes of in-groups, alienating the outgroup and recruiting people to switch sides.

How Affordances Enable Switching Support and Influencing Political Narratives
There were several themes that were discussed in the findings which illustrate how affordances are used by supporters to recruit others in Reddit and reward them for switching.
For example the post by u/f_batsiat was the top voted post and the affordances of creating membership and echoing are demonstrated when u/Tittsburgh-Feelers encourages everyone to vote the post higher. It appears that posts that show a degree of passion, willingness to use offensive language to express that passion and describing themselves in a way that shows or promotes membership are upvoted. This shows how the settings and functions of Reddit mediate the ways in which interaction unfolds on Reddit. Hence the materiality of media is essential to consider whilst analysing content on such platforms. Further the impact of this voting feature, and the LGBT community (6.2.4) ✓ ✓ Anti SJW sentiment (6.2.5) ✓ ✓ ✓ Russian involvement (6.2.6) ✓ The tick mark indicates that those particular affordances of Reddit were of at most importance for those particular reasons Fig. 9 Example of Twitter interaction on #Trump membership that it affords, is that it shows a majority support for the post and therefore for the view. This leads to 'framing' effects (McLeod and Detenber 1999), encouraging copycat behaviour and mimicking within Reddit and is likely to create a familiarity with the rhetoric that influences users' voting behaviour outside of the site. This is also likely to be the outcome of the supportive language used. The phrase "get him a coat" was popularised on Reddit through the repeated use and upvotes of the phrase. This indicates the influence that the membership of one community, within one online platform, unhindered by critique or debate, has on a much wider group. This is in turn reinforced through the features of upvoting and, in this instance, in-group language. The content of the posts show that the support that the community on r/The_Donald provide each other in this way has effects in the real world. Examples are frequently given of a positive feedback cycle where activism is encouraged or role-modelled through r/The_Donald and then rewarded positively when reported back.
The features offered by Reddit, as with any communication platform, mediate the interaction that takes place. An interaction order exists on Reddit but it is different to an in-person conversation due to the features that allow upvoting, downvoting, being able to edit posts after they are submitted and also being able to delete posts after they have been submitted and read by other Users. These are features which this study has identified afford the users easy ways to anonymously, yet meaningfully support, reward or exclude views as well as switch views.

Outcomes of the Affordances: A New Brand of Conservatism
The third aspect of the research question, the outcomes of these affordances, has led us to consider how people's views are affected as a result of their interactions on Reddit. As we saw in our discussion of SJWs, the right wing ideologues target political feminism. As Flisfeder (2018) points out, attacking feminism "reinforces patriarchal domination as a social, cultural and political institution" (Flisfeder 2018, p.5). In our earlier discussion, we saw how users on r/The_Donald accuse the left-leaning liberals of destroying traditional values and are tactical in placing the blame on them for the existing problems. These left-leaning liberals are branded as 'other' and often dehumanised in the process (see Kteily et al. 2015). This outcome are enabled by the affordances of credibility, echoing, creating membership and expressing oneself freely and the meta-affordance of redpilling which is fundamental in switching people's views.
What is interesting about these findings is that, whilst earlier right wing ideologues excluded homosexuals, Trump supporters embrace them and the findings support strong membership of this community within r/The_Donald, enabled by the affordance of creating membership. The emphasis on traditional values as well as inclusion of the LGBT community amongst these supporters is paradoxical and thought-provoking. The alt-right (who are amongst Trump supporters) is seen as a being more focused on excluding different cultural identities rather than the traditional lobbying ground of capitalism. Paradoxically, it is the "populist rhetoric of a socialist economic narrative mixed with a right-wing racist and sexist social identity that brought masses toward Trump" (Flisfeder 2018, p.17).
An online space such as Reddit and the affordances it provides gives the alt-right and its identity politics legitimacy through features such as reposts, upvotes and comments and Reddit is seen as playing an important role in this "conservative revolution" (Žižek 2008,p.304).
A second key outcome of the affordances is that, as an online space, Reddit has also provided the platform for former Bernie Sanders supporters (Afterberners) to openly switch loyalties. This is done through various affordances discussed in this paper, particularly through expressing themselves freely, and having the perceived credibility to be able to discredit Clinton through their posts and upvotes. In doing so Reddit provides a safe space for those who may otherwise have difficulty justifying their decision to switch with family or friends outside of the platform.

Affordances Enabling Legitimisation of Hateful and Hurtful Content
The analysis of the comments showed a shared dislike for Hillary Clinton among Trump supporters and Afterberners. The Afterberners were disappointed due to the alleged corruption in the DNC and became unhappy when Sanders showed support for Hillary Clinton. The affordances of 'echoing views' expressing oneself freely, and creating membership empower users to share this dislike or disapproval openly and sometimes vehemently. This freedom of expressing oneself freely is an important factor in considering how social media may impact on social freedom, or political narratives.
What would be considered to be controversial, libellous or trolling posts in other platforms, are allowed because of the way that features like membership rules, anonymity, personalisation and in-group language have evolved into affordances like echoing (controversial beliefs), Redpilling and credibility for posts containing controversial views. This has implications for freedom of speech -Reddit invites derision from groups who state that it is an incubator for hate speech (Flisfeder 2018) however the site itself contains features present in other sites. However the one major difference (anonymity) and the way in which the affordances have evolved shows that these are being used to protect or exercise their right to freedom of speech. To that end, this study makes a contribution to the understanding of affordances in highlighting 'freedom of expression'.

Theoretical Contributions
The contribution of our study is twofold, one in advancing the understanding of affordances, and two, to shed light on how the affordances of Reddit influence outcomesin this case, political loyalties in the case of Trump supporters. Our study has enriched the understanding of affordances in several ways. We have shown how people engage with Reddit differently to other social media platforms. The exclusion of alternative views, ingroup language and the freedom of self-expression are some of the features which lead to the affordance of creating membership on r/The_Donald. We have shown how this leads to political narratives, in this case, support for Trump. This is different to other platforms such as Twitter, and we have demonstrated that through our findings. Theoretically, affordances are important to consider whilst carrying out a study on digital media platforms. It is essential to look into the features that digital media platforms provide, and the affordances linked to these feature as they deeply impact User engagement and resultant outcomes. Reddit, a seemingly intellectual space (see Flisfeder 2018) creates a sense of community, membership and the echo chamber where ideas can propagate free of critique.
Through our analyses, we also underscore the importance of evolution of affordances. While we identify four main affordances at the start, our subsequent investigation into the reason for shifting loyalties also shed light on the creation of the new meta-affordance -Redpilling, which is specific to r/The_Donald. As discussed, the many roles that redpilling plays within r/The_Donald raises questions over whether a meta-affordance is in fact an outcome or a 'pre-outcome'. Having been 'redpilled' by others, users have passed a rite of passage for the community and are clear advocates for the cause but this advocacy is, in itself, not an outcome so much as the necessary condition for the later outcome of either switching support or voter behaviour.

Consequences of Outcomes Observed and Implications for Practice
Our third research question asks 'What is achieved by the use of these affordances?' Through the findings of this study we have shown evidence of how individuals were encouraged into and/or rewarded for, switching their support to the Trump campaign due to discussions on the subreddit r/The_Donald. This helps us appreciate the significance of such platforms in influencing voting decisions. In line with Flisfeder (2018) we have shown how an "intellectual" online space such as Reddit reinforces or creates individual beliefs about presidential candidates with no requirement for critical analysis, and how the affordances of such platforms shape narratives. Interestingly, as we address in our findings, Hern's (2018) Guardian article shows how Reddit recently admitted to being infiltrated by Russian propaganda in the run up to the US elections, which led to the removal of hundreds of accounts on Reddit. This in itself is evidence of the perceived power of such platforms by those wishing to influence narratives. It is crucial to acknowledge how the affordances of social media platforms can be misused by powerful entities in order to influence politics. However, as addressed in our findings, as many such accounts were removed it can also be argued that the remaining discussions on Trump were in fact organic and represented the views of the community.
The evidence gathered contributes to the understanding of the communication of right-wing populism and how this is shaped by social media in order to influence elections. It highlights the different ways in which populism can be constructed and how the platform itself, through its affordances such as ingroup language, membership, exclusion of alternative views and expressing oneself through anonymity and votes has the power to influence narratives. The freedom of expressing oneself freely afforded by anonymity that Reddit allows, is particularly significant, and makes Reddit stand apart from other popular social media platforms such as Twitter and Facebook. Anonymity is embraced, and celebrated on Reddit by its' users, leading to the affordance of the freedom of self-expression demonstrating how affordances evolve on such platforms.
This study has implications for the use of social media and how it influences politics (for example see Kim et al. 2018;Keller andKleinen-von Königslöw 2018, Fitzi et al. 2018). Our unique contribution is entrenched in how no previous study has looked at how Reddit influences behaviour. With regard to our broader contribution on the social media literature as a whole, our study has shown how affordances of a digital media platform shape political narratives. Through membership, echoing, credibility, expressing oneself freely and Redpilling, we have demonstrated how extensive support through an army of users on a seemingly intellectual online space can be created. Whilst the manner in which this is done is different on Reddit, our study reinforces the notion that any digital media platform has the potential for such power. We have therefore shown how affordances evolving on social media lead to self-reported changes in behaviour and propagate extreme or controversial views that can influence political narratives. The way this happens on Reddit is different than has been seen across social media platforms because of the totality of the echo-chamber.

Conclusions
The purpose of our study was to advance the understanding of affordances of Reddit, and to highlight the importance of Reddit in shifting loyalties during the 2016 US elections. We have examined how the affordances of Reddit have led to outcomes such as impact on the 2016 US elections by scrutinising 100 posts and subsequent comments on the subreddit r/The_Donald. These affordances are in echoing members' beliefs, credibility through posting and registration, expressing oneself freely, creating membership through visible artefacts and Redpilling. The structure of the site and its personalisation provide ways in which membership are clearly evidenced. The material aspects of anonymity, upvoting, karma and the rules of each subreddit provide ways in which Users can create a 'safe' space to air their views, use convincing language and narrative to recruit others and to reward those that share the same attitudes whilst excluding alternative views.
The use of language, in particular in-group language and codes makes many posts unintelligible to non-supporters.
We have demonstrated the ways in which Reddit as a platform is able to influence and support narratives (see Table 2). This is done through providing a supportive space; adding credibility to opinions; and legitimising hurtful or hateful views. This space is employed by Users to air views or opinions without fear of disagreement (via the rules of the subreddit), or attracting personal attacks (as a result of User anonymity). Therefore, members are easily recruited, potential swing-voters are made to feel appreciated, rewarded and encouraged to switch and potentially controversial (in some cases hurtful, hateful or prejudiced) opinions are framed and given conditions in which to propagate and become norms.
Our study contributes to the existing field of social media research (see Kapoor et al. 2018 for an extensive review) by spotlighting a media platform that has been under researched. As our study was qualitative in nature we were able to contribute towards further understanding how political views may shift due to affordances of Reddit. However, in order to obtain a more holistic picture of Reddit, other analyses, such as sentiment analysis, may be used in future which would assist in generating structured analyses. We have also demonstrated the differences in digital media platforms leading to differing discourses. Future research can focus on detailed comparisons between digital media platforms in order to obtain further insight.
In this increasingly post-truth era, where opinions and perceived identity seem to matter more than objective facts, a seemingly intellectual online space such as Reddit plays the role of a powerful control system (Giddens 1991) which through its affordances has the influence to shape voter views. We have also demonstrated how it is of key importance to analyse and evaluate Reddit from the dual perspectives of both information systems and sociological disciplines.
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