The players want to earn more, so they use all sorts of manipulations. In casinos, people are willing to take risks, including the risk of violating the rules of the casino.
The casino does everything possible to stop various manipulations, so all suspicious accounts are blocked and users who are suspected of manipulations are not allowed to withdraw money.
The main thing is that the accounts of honest users are not blocked under the guise of manipulation. And then you can suspect everyone in everything.