That's because there are hardly any legit ones anymore.
BCT has become a haven for ICO scams & other rip-offs but moderators seem to do nothing about it - even the most blatantly obvious scams are allowed to run on this forum unhindered because the scammers behind them know that they can get away with it here - it's farcical tbh. Worst still, any forum member who calls the scams out is immediately set upon by the scam groups & their many shill/fake accounts, resulting in honest forum members getting negative feedback for trying to warn others - which then puts other members off calling scams out.
If moderators continue to let these scams go unhindered I can see the SEC having no option but to move in on BCT itself - because by allowing these scammers to promote their scams on this forum, BCT themselves are actively promoting them - which is precisely what the SEC want to stop.