Abstract (eng)
The rapid development of online social networks has transformed how people interact and share their thoughts, but growing concerns over privacy, data ownership, and corporate influence have driven a shift toward decentralised alternatives. Unlike commercial platforms, decentralised online social networks (DOSN) promise greater user autonomy and community-driven governance. This study explores user activity on Mastodon, one of the most prominent DOSNs, focusing on key factors that drive user activity, including governance structures, technical infrastructure, and engagement. Using a quantitative approach, this research combines computational analysis of Mastodon API data with a large-scale user survey to examine patterns of user activity. The findings reveal that instance size and active engagement—such as frequent posting and interacting with others—are the strongest predictors of user activity, while technical infrastructure plays a more supportive role rather than a determining one. Governance structures, such as moderation practices and community guidelines, show a weaker but positive correlation with user activity. These insights highlight the importance of fostering meaningful interactions and keeping communities at a manageable size to sustain user activity on Mastodon. As decentralised platforms continue to grow, this research offers a foundation for future studies on user retention, community governance, and the long-term sustainability of DOSNs.