never withdraw directly to an exchange
ok, people say to never directly withdraw to an exchange, but always first to your wallet.
let me picture that for you.
scenario 1
gambling site withdrawal => exchange = a no, because they can see it's from a gambling site, and close your account.
ok, clear.
so, you should do,
scenario 2
gambling site withdrawal => your wallet => exchange
not clear. i mean, if an exchange can see if the transaction was gambing related in scenario 1, they also SHOULD be able to know by looking one transaction further that it's still a gambling related transaction... right? especially with a new unique address, you get your commission, let's say 0.5123 btc. you deposit this balance to an exchange. exchange checks where it's coming from apparantly, your wallet address should be clear. IF they would look one step further though where that btc is coming from, they can see it's gambling related.
maybe they are not checking further than one step at this moment. can be a matter of time before they will i guess.