There’s a bot that will ban most of those spam bots called Beemo. You realize a lot of bots are verified right? I’ve seen scripts to verify accounts on GitHub and spoken to the kinds of people who would automate accounts via scripts just to have a bunch of alts. They get numerous alts into servers just to spy. Its a kind of art I guess. I wouldn’t recommend doing any of these things.

Personally I just wish Discord wouldnt rate limit bans if they’re not going to make a true effort to catch these bot farms. Gee I wonder how likely it is that three thousand accounts will decide to join the same exact server at the exact same minute? Having modded a decent (tens of thousands) sized Guild I gotta say people pop in every few minutes or seconds. Unless something big and relevant to your server happens that draws more traffic, but even then never thousands in seconds.