When it comes to real world illegal casinos, they are often tied to organized crime, because organized crime just takes every illegal business under its wing - drugs, prostitution, gunsm etc. But on the internet, casinos can be very independent, as they don't need any "protection". So, they are just like any other business, trying to offer the best service to their customers. There's a common misconception that casinos get profit because they are cheating, but in reality they just have a small publicly disclosed edge, and when it comes to Bitcoin casinos, this edge is much smaller than the edge of legal fiat casinos. I personally had very good experience with Bitcoin casinos, and I see that they really care for their customers and always try to improve.