The casinos that impose withdrawal reviews are usually pretty small nowadays and you won't find many of them as people tend to gravitate towards casinos with quicker transaction speeds. Most of them have gone out of business or aren't too popular.
What? That definitely not true, pretty much all fiat casino's have delays on payments and quite a few cryptocurrency casinos have them as well.
I mean just look at this thread, enough people have provided examples of casino's that make you wait days before receiving payments.
Not only that, they also randomly lock payments for review.