well...whoever owns the forum needs to get out there and spread the word, so to speak. It's easier than it sounds...i own a forum...not yaoi, though, and all you need to do, is...find people that are interested in yaoi...you got friends, get 'em to sign-up...advertise.
i agree. and what people needs to do is post regularly because a good sized group have signed up but stop coming probably cause no one's around. Come on people, post!