I agree. They casinos will require you to pass some KYC documents when you cheated, or if your transactions on the casino including the deposits, withdrawal, and any bets are heavily suspicious.
Whether KYC will be required for suspected users but I'm not sure the casino does that, so the team followed the terms and conditions unless changed to require KYC for all users.
I do not know exactly how can the track it but I believe they have the tools that are needed for that matter.
The team can track if they find cheated activity that harms the casino due to the highest wins in each game, they also track your activity history with details including your deposit and withdrawal addresses to prevent money laundering and other activities that violate the terms and conditions.