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Honestly, I'm wondering why there are still some people bought this script to run a casino while in fact it is proven to be failed many times.
Good question, casino software providers are a separate party from the company, they are not developers. Generally, they don't want to know about the continuation of their previous clients, all they offer new buyers is a portfolio of script sales.
"Proven fair" is such a common catchphrase that even casino companies may not even be aware of the original scripts they're buying. On the other hand, the company does not have the technical resources that can maintain and develop the platform according to the wishes of the players. As a result, they fail a lot.