I just realized that could play an important role in the fediverse for addressing the problem of finding relevant content in a decentralized infrastructure.

The idea: A system that supports subscribing to newly published content based on the topics the content is about might be much easier to implement than a decent search over decentralized instances.

OpenBiblio.Social

Der Einstieg in das Mastodon-Netzwerk für Bibliotheksmenschen