I don't trust neither #MarkZuckerberg nor #JackDorsey one millimeter. For good reasons I never used any of their services.
It wouldn't surprise me, if those billionaires just try to get #fediverse users and data and afterwards close the gates.
However, I'm not yet convinced, that general containment or segregation is the best way to deal with it. Doesn't it contradict the concept of #federation?