In any case, before registering at the casino, you need to read the terms of use to know what you can do and what is forbidden to do at the casino.
Almost all casinos have the same terms of use. The same things are prohibited everywhere, such as the creation of multiaccounts and all sorts of frauds and manipulations with the account.
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.