From Niche to Mainstream: Community Size and Engagement in Social Media Conversations

TL;DR

This study examines how community size on social media platforms affects user engagement and conversation dynamics, revealing that smaller communities foster richer interactions while larger ones promote broader but shorter participation.

Contribution

It provides a comprehensive analysis of user behavior across multiple platforms over 33 years, highlighting the impact of community size on dialogue quality and engagement patterns.

Findings

Smaller platforms have more sustained interactions.

Larger platforms encourage broader but shorter participation.

Niche communities maintain high participation regardless of size.

Abstract

The architecture of public discourse has been profoundly reshaped by social media platforms, which mediate interactions at an unprecedented scale and complexity. This study analyzes user behavior across six platforms over 33 years, exploring how the size of conversations and communities influences dialogue dynamics. Our findings reveal that smaller platforms foster richer, more sustained interactions, while larger platforms drive broader but shorter participation. Moreover, we observe that the propensity for users to re-engage in a conversation decreases as community size grows, with niche environments as a notable exception, where participation remains robust. These findings show an interdependence between platform architecture, user engagement, and community dynamics, shedding light on how digital ecosystems shape the structure and quality of public discourse.