It's sad to see the reputation of this casino has become so low regarding their KYC process that people start to wonder if it wouldn't be safer for their funds to buy an account from someone else, already fully KYCed than risking to not being able to give some random documents required by this casino once they will be asked. That's crazy. I think this casino really needs to change its policies about account locking and KYC requirements.
stake is the casino with a very good reputation, just test it for yourself and you will see that you won't have any problems, regarding account verification, this doesn't just happen at stake, these guys who sell casino accounts do it for all casinos , this includes your subscription casino. I very much doubt that there are no people who bought casino accounts from your subscription. This is because this procedure that these people who sell accounts do is difficult to detect immediately, for example, let's suppose that OP has access to leaked documents from person X.
So OP creates an account at your signature casino and uses these documents to verify the account. then OP will have a verified account at your signature casino. because OP will upload ID and address proof document. The only way to prevent these cases would be for casinos to do like exchanges:
ask people to take photos holding their IDs and then pass the face scan.
but I think that casinos do not need to reach that level that exchanges have reached, because it is enough for all casinos to place requirements that people need to play with 100% of the money deposited before withdrawing, the real problem with this account purchase thing is that many People buy accounts to abuse bonuses. I honestly can't understand why there are people who are obsessed with casino bonuses.