Like I know you are indirectly saying that the casino determines when someone wins over their gamble site? Because to me, and from my understanding, the casino doesn't decide whom to win or when to win but it's auto set where winning hits on a random but we must know that the chances of winning are made extremely poor for the gamblers and when a winning is secured it's a like miracle to those who are gambling because it's already designed to be very poor for gamblers.
Most of the time, casino is just a business brand, the softwares used are not manage by them, they just create the platform, do their UI and all that to be able to upload the software on their platforms. The software companies that build this games lend it to casino companies and they get a share based on the contract signed that's why you see a Casino can have 50 games and even more depend on the ones they made available for there users.
The game mode is determined by the software companies, they are responsible for the income model and all other things. Most of the time, they have been tested and trusted and more updates are been role out when necessary and most of the time, it favours the casino because it's when the casino is making money they get more service to render and more money comes to their bag. Even bookies are determined the odds of games, the casino has nothing to do with how things change.