Don't know what's going on here in depth, but there are casinos that have their own token and both the casino and their token are doing great. However, if a casino has its own token, the main focus should be on the casino. The token will grow and increase in value over time once the gambling site is popular. The success of a gambling token is dependent upon the success of the gambling site/casino.
It will collide also in the use case since if a casino will apply more usage to their token for sure it will create reason for their holder to hold or even use it for good in their platform so if a casino will just rely on their success maybe we can only see a short term pump, but im the case of Betfury for sure they have more cool stuff added to give more benefits to their token.