@dump_stack idea that fedi somehow invulnerable to botfarms always seemed strange to me. If someone can register 100500 profiles in twitter or facebook, why he can't register 100500 profiles on 100500 fediverse nodes? Centralized service at least theoretically can analyze profiles and notice that Alice and Bob have suspiciously similar IP, fingerprint and request pattern. On fedi there is no entity that can do such check for @Alice@cat-worshippers.club and @Bob@dog-lovers.social

Federated software let you make small walled garden more or less free from disturbing outsiders, but that strategy has size limit

Fedi is cool in may way, but protection from botferms not one of it strong sides