If you ever play on big casino like bc.game or stake.com, you will understand there is always some kind of "maximum winning".
Thus you won't able to become millionaire by playing on that site alone for that reason.
That is max win for one bet alone not total max win on all your game in that casino since other high roller players literally won more than a million on each game. I believe you misunderstood the concept of max win on the casino
Besides, not all user aimed to become millionaire by playing in the casino so what’s the relevance of this statement to your service offered? As if you can guarantee million profit just by using your service.