I think they already run away with their players money, these days it's really hard to play on a new casino platforms since you don't know if they would be legitimate or not or soon they will be like this running away with their players fund but we can't blame users since some of them offers really tempting promos.
You can know the legitimacy of the casino or sports maker through their licenses if you're playing with a casino like this they can easily run with your money and you can't do anything about it since you didn't know their licenses and you cannot sue them, well those offers are just to attract users.