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I think the same, I have always disagreed with the idea of casinos being allowed to extend credit to their clients, if we were talking about a real estate agency or a car shop then it would make sense those businesses could do so as what they are selling is too expensive for the majority of the people out there, however a casino only sells entertainment and as such they should not be allowed to use such tactics which take advantage of those which do not understand their games.
From what you've said, it's actually not easy for a casino to extend credit to its customers, especially for online casinos, it's definitely impossible.
In contrast to land-based casinos, maybe casinos can provide credit for customers so they can continue to gamble when they have no money at all.
But indeed this idea is not feasible to implement because it can lead to dependence for those who want to continue gambling sessions with this credit capital and in the long term it will only lead gamblers into debt problems.