This is an obvious consequence of more users moving to Lemmy… do you think spammers will not follow the users, specially on a place where anyone (not matter how spammy) can run their own instances and try to federate with everyone else?? Their only challenge is to stay in “business” without being banned for as long as possible, but as they can keep spawning new instances longer than you can keep banning them, that seems like a losing battle.