if problem is Huge number of posts + replys in Altcoin / bounty
i think you can make new sistem, for example :
1 - max reply in day will 10 (10 post is normal for share and resive information)
2 - make different with verified users, for example with KYC.
here is a lot of connected users, i think if forum will be with KYC, many spamer and fake users will be blocked.
and this problem will be solved.