Here's one way it could happen
- Facebook joins the Fediverse, becoming the largest instance
- Majority of Fediverse embraces this
- Facebook decides to deviate slightly from ActivityPub
- Not wanting to be disconnected, majority of Fediverse follows them
- The real, ActivityPub-based Fediverse is dead (or as small as it was when it started) and now Facebook controls its (former) instances
Comrade Zuck doing us a favor and ideologically purging the Fediverse of all the liberals by extinguishing all the collaborationist instances. o7