Effects of Algorithmic Visibility on Conspiracy Communities: Reddit after Epstein's 'Suicide'

TL;DR

This study examines how a surge in mainstream visibility after Epstein's death affected participation, discourse, and community cohesion in Reddit's r/conspiracy over a year.

Contribution

It introduces a computational framework combining toxicity, survival analysis, and lexical measures to analyze community dynamics during visibility shocks.

Findings

Users joining during the arrest period show higher linguistic similarity to core members.

Visibility increases community size and alters composition and linguistic cohesion.

Incidental exposure does not lead to long-term, integrated community members.

Abstract

Following the death of Jeffrey Epstein, the subreddit r/conspiracy experienced a significant visibility shock that brought mainstream users into direct contact with established conspiracy narratives. In this work, we explore how large-scale surges in public attention reshape participation and discourse within online conspiracy communities. We ask whether a sudden increase in exposure changes who join r/conspiracy, how long they stay, and how they adapt linguistically, compared with users who arrive through organic discovery. Using a computational framework that combines toxicity scores, survival analysis, and lexical and semantic measures over a period of 12 months, we observe that mainstream visibility is is associated with patterns consistent with a selection mechanism rather than a simple amplifier. Users who join the conspiracy community during the arrest-period tend to show higher linguistic similarity to core users, especially regarding linguistic and thematic norms and showing more stable engagement over time. By contrast, users who arrive during the height of public visibility remain semantically distant from core discourse and participate more briefly. Overall, we find that mainstream visibility is connected with changes in audience size, community composition, and linguistic cohesion. However, incidental exposure during attention shocks does not typically produce durable, integrated community members. These results provide a more nuanced understanding of how external events and platform visibility influence the growth and evolution of conspiracy spaces, offering insights for the design of responsible and transparent recommendation systems.