Someone asked what crime it is to refer people to exchanges and earn rebates. It could be classified as illegal business operations. If you know an exchange has issues and something really goes wrong later, it might involve illegal fundraising. But in some real cases, like when an exchange's server gets hacked and the backend data reveals you made big money from rebates, they usually just ask you to return the money and let you go. There's no other point in going after you. However, exchanges like Binance, OKX, and some on-chain perps generally don't have these kinds of problems. The exchanges that get targeted are usually ones you've never even heard of.