From what I’ve seen around some subs moved and continued its existence, while other didn’t become active and in some cases people just snatched names of subs on most active instances expecting probably that people just flock in. Some subs attended the protests and returned to the usual activity but it seems that majority didn’t bother. Small number moved to discord or were there already extending community activity.
Fediverse seems to be attractive to people who are both consuming and providing content and who are also engaged in technology to the particular degree. Majority obviously doesn’t give a single flying fuck about what happen to reddit by badluckhuffman hands and just waited till blackout will be over.
while we’re at this, some mastodon clients allows you to block domains (there are cases where this is pretty handy) while rest asks you to do that by your server’s web page. wish that’d be a standard feature for all clients.
also, i’m in the blocking camp and i believe there’s not a single bit of good in any form in allowing big networks ran by corporations to join the federation. they’re aiming for the own profits only.