As we know that most gambling sites will require you to gamble and wager your whole balance once, before you can cash out or withdraw from the gambling site and they take this measure so people do not do money laundering whereby deposit and withdraw without gambling.
Correction, it doesn't need to wager the whole balance. Just a percentage of it
e.g 20% of the deposit amount or in most cases, ranging from 1x to 2x turnover, etc. But honestly, just come to think of it, why users will just deposit an amount on that gambling site and then later on, will withdraw it without even playing? It's already alarming and will really lead to suspicious activity.
Aside from that, anything about AML policy is one of the requirements that a centralized gambling site should comply with. No choice but to follow.
Now the point here is that on the gambling site, there are many easy winning bets with odds like 1.01x etc. If the money lauder is sensible he can easily be wagering the whole amount by placing a few bets where the odds are very low and the winning chances are 99%.
It's a wrong mindset to think that odds like 1.01x is a sure win. If it does, you should have already seen that as an effective strategy on most sports bettors. Specifically referring to saving the ass on the purpose of doing money laundering, kind of risky for me to just bet on that kind of odds to make the plan succesful.