The only reason why Mastodon is free from crypto bros and other plagues is because there's not enough people there to make that effort. Any sufficiently successful community will be attacked by marketers pretending to be genuine people. You can either stay under the radar or be ready to ruthlessly enforce rules against promo of any kind which in the end turns out to be unpopular because with a big community you get lots of people who opt for default things in life.

Been there, done that, which is why I'm here. I wonder how much worse it is with LLMs.