Judging from their past and all the bad actions they have done in the past, bad for democracy, privacy, minorities and marginalised people and how openly they have a far/extreme-right bias. Well I feel extremely negative about them joining in. They were also part of destruction of another open/federated protocol in the past: they played big part in destroying XMPP/Jabber messaging. So I am afraid they will do their usual embrace, extend, and extinguish thing and their surveillance capitalist thing and yeah. no good. Best to block their instances outright.