Not all promotions should be free, a casino is a business and owner should be able to manage the funds for promotions wisely. In this case, they have provided free predictor for many rounds and it is reasonable if they try to make a new promotion which is not free but they do not do it in the best way.
I agree, but the promotions should still be attractive even though there's some kind of condition in it because we know that every client wants to have something free in the business and it's difficult to do that kind of promotion that is a balance of attractiveness and profit.