@riley@toot.site You can only sign up using an invite code from someone else, everybody has infinite invite codes, but the system tracks who invites who and if your account becomes a constant source of problematic accounts then you may be banned yourself

This is a very effective way to wipe out an entire subtree of abusive accounts at once, because "obtaining lots of different invites from different people that cannot be connected together" is an approach that just doesn't scale in the context of spam, so spamming becomes uneconomical and sockpuppetry becomes a pain in the ass