Combo of terrible moderation rules changes by meta, the release of the pixelfed app on Android and iOS, and coverage of that app by major tech news outlets.
Meta has changed their ToS. Prior, you could not accuse someone of being mentally ill without consequence. Now there is an exception allowing shitty people to accuse someone of being mentally ill if they are gay or trans. It's seriously fucked up.
Also, Mark Zuckerberg, the ostrich fucker, removed the fact checker from Meta services.