Evil company makes money by trapping their customers into gamblers. The implementation method is building the highly controlled rank system, which uses evil psychological model to let you lose in a row. The more angry you are the higher chance you play a next round. And the system will comfort you after your long lose such as 8-15 games by win in a row. Using such a cycle, the ultimate goal is to keep you playing to maintain their operation index. Will be 0 if there is an option.