Though, you are implying there it exists complicity between money launderers and those who own the casino, which it could be possible, however regulators are in their positions of power in order to avoid such things from happening to begin with. Assuming there is no complicity between the owner/staff of the casino and those criminals, there there is only one option left, and that would be to deposit their black money onto the casino and then trying to withdraw it as soon as possible after gambling a bit, there is where minimum wagering restrictions kick into the game and make it harder for those criminals to withdraw the same amount of money they deposited. It becomes a risk for them to use casinos to launder their money and since we are talking about millions of dollars of black money, it becomes a risk they cannot afford in any way shape or form. AML policies are there on casinos for a good reason, to make them unattractive for criminals to launder their black profits.
Isn't it possible for a casino to develop and integrate a game in which the game system can be manipulated? I think this is technically possible and easy too.
The agreement with the money launderers will be made directly to stipulate the possibility of creating a regular account that completes all KYC identity verification procedures, then deposits in the form of small amounts to be used entirely in that fictitious game that should give them a portion of the entire deposited amount in the form of profits and the rest goes to the platform owners according to the agreement. Isn't this a possible scenario?