Without a doubt a casinos like that will be in high demand, but we must not disregard the power of marketing, there are also some dishonest casinos out there which promote themselves in an intense manner all over the Internet which can get a lot of costumers to try their games, only to scam them in the end.
And with gambling getting more popular each day, it is as if there is an unlimited number of new costumers ready to gamble which are simply too naive for their own good, and decide to gamble in those dishonest casinos despite not having any of the characteristics which make a casino any good.
Marketing is what is basically used by any service or website to attract users toward their business, either by offering giveaways, bonuses, or services that make users join them. But, I believe that marketing can be useless in the long run if the service being offered is not top-notch since even if users join at first, they won't take much time leaving the platform if they don't find it convincing enough.
So even if a casino has a great marketing strategy, if they lack the basic things that a gambler looks for, like good customer support, a user-friendly user interface, and obviously a good reputation, they will lose a lot of customers very shortly after gaining them.