They have to because if they cheat, they'll face the consequences, when a gambling site applies for a license, it's not the gambling site that will dictate on the terms, its the government, and therefore gambling sites has to follow the requirements in order for them to pass and will be granted a license.
if they cheap the government in any way, that's called a violation of the law, and there is a corresponding punishment on that, depending on how serious the case is against the gambling site.
They would need to abide if they wont like for their business to be fucked up once they've been caught.Of course they are fully aware on terms and regulations that they should follow.
I wont say that their totally fair.It would vary on the house if they would consider on making those shady movements for their benefit but for a big business like casinos then
i dont see a reason for them to do such thing.They would prefer for their business to go long term rather than being busted on a short period of time.
I guess it is impossible to last long, gamblers are also not too stupid they can pay attention or calculate, unless the game is full of luck.
if not, it will be difficult even for a few moments.
they can be reported if the law does expressly issue this regulation.
or their casino will be quiet because people will find out the cheating sooner or later.
They can cheat but as said, nothing do last forever and yes, players arent that dumb not to detect any rigged situations.