The beauty of the fediverse is that the last panel can’t happen.
We control our own instances. There’s no world where admins wouldn’t defederate from any Facebook attempt to barge in.
Maybe a few larger instances sell out, but users hold the power here now. If an admin betrays our trust, we’ll just make a new instance.
My problem is that people talk as if these are the only options.
There are other services, like VRBO, that do the same thing and usually have the same properties. AirBNB is garbage now, so just use an alternative that doesn’t have the same bad policies and high fees.