I created an account today to play only with BTC, I didn't put any name or anything, and when I cashout they sent me an email that said:
I did not understand anything, do you can withdraw your bitcoin or you can not withdraw your bitcoin?
Why they fuck would they want my ID and proof of address if I only deposited once and only in BTC?
You wonder why? answer: because they want to show that they are a very serious company and that they are legally registered in Curaçao. Now, where is Curacao is where will you understand everything.
then you are logically also allowed to withdraw without KYC!
unfortunately, all sites allow people to deposit but force people to make KYC if they want withdraw their money