Distance immediately? I think that was quick. It's wrong to judge them without proving that they are truly shady. There are lots of ways to know if a casino is a scam. You can do it by yourself by trying their free offers. If you can withdraw the money then maybe they are legit but you must be careful and play small amount first because the early wins can only be their lure or bait in order to make the player confident.
If we are too scared to test the gambling site on our own then we can read the feedback of those who tried it. Legit casinos are the ones that can usually grow big but there are also big casinos who are still a scam. They might have lots of connections and they bribe them money to continue their operations.
there are many ways to find out if the casino is a scam or not and it is more effective if you use a small deposit method and try several bets and try to withdraw funds and do it several times. because usually the first withdrawal is successful it can be just bait to deposit even more funds.
only it's a more effective way than reading reviews alone, because many fake positive reviews are published on several sites and pay for each positive review.
doing your own research is much better.
A scam casino doesn't necessarily need to delay your withdrawal but they can use different ways to do that which you might not notice initially, for example, a casino that plans to scam their customers will simply not let them reach a point where they can request a withdrawal since they will have their games rigged and you will eventually lose everything whenever you are about to reach the point where you could withdraw the winnings.
Such casinos are caught but not initially, after some time and only by a few players who are good at observing things around, otherwise, a normal player would never even have a doubt, all they will think is that they are unlucky and not winning at all.