This paper contributes to platform-comparative research through a case study of Twitter/X, Telegram, and Gettr in the context of German far-right social movements. It introduces the conceptual framework of platform opportunity structures to examine how platforms enable or constrain far-right mobilization. Using community analysis of sharing networks among the same pool of far-right social movement actors, the study explores how technological affordances, governance models, ownership and branding, and user bases and cultures shape platform-specific networking patterns. The findings reveal Telegram as a central platform for the most radical and active communities; Twitter as a site where anti-elite journalists and politicians are salient; and Gettr as a platform to connect to the U.S. far right. While anti-elite and COVID-related conspiracist figures exert influence on all platforms, the prevalence of AfD politicians, pseudonymous amplifiers, and transnational ties to the U.S. far right – especially after Elon Musk's acquisition of Twitter – are emergent factors. As Twitter shifts toward 'alternative' platforms like Telegram and Gettr, offering minimal moderation and security and even ideological branding, this article adds to understanding how dynamic platform opportunity structures shape far-right mobilization online.
Baoning Gong (Tue,) studied this question.