If a casino asks for KYC, then you are in trouble. Most of the time when this happens, your money is gone. Although there is a small percentage of times that you'll get paid.
I did the KYC and passed and doing their additional security check. I did multiple KYC's in the past. But not as slow as FJ. Hmm I hope that's not true.
If you read the forum here, most of the time when a casino asks for KYC when you want a withdrawal they are keeping your money.