Yeah, the KYC is trouble for the ones who are high-rollers because if they win a lot of bets then surely they'll have to pas KYC in order to withdraw the money that they have won. The casinos often delay the KYC of those players who earned a lot of money and that's a fact. Most of the casinos known to delay the KYC approval and that allows them to pay the winners a little bit late and most of the players don't have patience to wait for that long and during the approval time they tend to place more bets and end up losing everything. That's why it's far better to have KYC approval before gambling with any casino.