Over the past decade, social media has come to the fore of collective action discourse. Much of the research in this space has focused on the use of social media as a tool that, in some form or another, influences the diffusion of collective action related information and the recruitment of participants. This paper claims that “social media” is a term at risk of reification and “black-boxing” in the collective action lexicon unless researchers unpack the inner workings of the artifact. As such, this paper uses the theories of encoding, computed sociality, and McAdam’s work on recruitment to social movements to analyze Twitter’s “account suggestion” feature. Further, it argues that the fundamental design of this feature does not necessarily facilitate participation in high-risk collective action.