I don't really post about Ukraine and haven't had anything go remotely viral recently. So there's something sketchy about randomly getting followed by three brand new accounts from one Ukranian instance, all of which have relatively few followers and are following 10,000 or more Mastodon users. Especially when clicking on each profile reveals an error message.
Maybe admins over there have already squashed the sketchy profiles? I don't know. Personally, I am blocking that entire domain for now.