It all goes well, casinos make a lot of money and get bigger. The only other industry players that can rival Casinos are exchanges and the now banned crypto mixers, but exchanges seem to prefer a referral kind of approach. Maybe it works for them better than the advertising traditional way.

If you look at other players like noncustodial wallets, crypto card services, payment processors etc, I don't think they can raise as much money as a casino can do for advertisement.