One popular instance, Beehaw announced that they defederated from lemmy.world and shitjustworks to protect itself from an onslaught of new folks. Beehaw’s admins say that lemmy.world and shitjustworks have let in a lot of folks who aren’t well vetted and are the focus of most moderation action, so they’re restricting access from those two instances.
And I’m over here on an instance with 600 users like, “Hm. That’s a pity. Glad I’m not as basic as those poor folks.”