When real money is involved on the internet the worst kinds of stuff results, and it takes a lot of effort to avoid it. How's that going to work?
None of this is to take away from your accomplishments here, by the way. The exact opposite in fact, you've got an interesting enough idea that it prompts interesting questions of the mechanics.
P.S. do you have any long-term plans to IPO this if it becomes successful? If not, some kind of guarantee that this platform is immune to enshittification would probably be very, very popular.
when a sub-forum crosses a threshold of insensitivity, just remove it from search and let those fans direct link
sub forums can remain popularity contests where community decides if anything there is a good fit. theyre already echo chambers and nobody is aiming to solve that so just run it that way