A KYC at an online casino is not a big problem in itself. Many players have gotten used to that. It only becomes a problem if players refuse to provide this information. Often referred to as the terms and conditions, they almost always state that the casino reserves the right to perform the KYC, which will happen. Then it is only a matter of time before that takes place. A KYC can, however, be carried out in 24 hours. I often wonder how casinos check such information, since they don't have access to the local authorities for information
I think not all gambler agree with KYC on casino gambling site but they just try how to hidden identity by upload document ID on gambling site, many gambler try with casino gambling site with cryptocurrency platform because they want easy when depositing fund with cryptocurrency without have connected with bank account, maybe if trough bank their document or bank book will show to public and looks identity will not private again, so trying with casino gambling without have to use KYC and keep hidden as they are active on gambling.