You are absolutely right, and to add, I personally have not come across any casino that listed a token that belongs to another casino on the platform, I believe it's safe to say that this is due to the heavy competition among online casinos, every one of them is trying their possible best to become the best, and I believe they probably see listing a token belonging to another casino as helping such a casino to climb up, which is something they don't want to do, this is just pure business ethics I believe.
No casino will accept another casinos token and not even all exchanges list them, that shows how limited supply the tokens could be since it function and scalability is limited to only their platform and a few of Depp's exchanges.
-But then that lead me to the question of whether casinos must spend such a huge amount of capital to develop those tokens and if yes, what is the way the casino aims to gain back the capital if the token can't be used outside their platform?
-shouldn't casino tokens be limited to only reward in-house and no need for hype since they are designed with short-term services in view?