I believe some of casinos doing cheat to earn more money. But mostly player (newbie player) don't know this casinos do cheat or not.
For online casinos maybe they work in their system to cheat the player. For player we hard to identify this online casinos run cheat or not. So better if we lose much, it's time to stop playing. Online casinos easy for them to run cheat on their system.
Dude you even have any idea what provably fair system is? Or are you just typing out everything your mind says without questioning it and starting to shitpost to get paid?
All online "reputable" casinos have a provably fair system to make sure all roll are verified and there is no bias by the house on the rolls. Again the algorithm can be used to verify the rolls on a third party verifier. Without it the casino is scam for sure and their representative on bitcointalk would be given negative trust - to identify them as scammer.
Not all, some casino dont even have provably fair. In regards to that, it doesnt mean they cheat either but it is EV- so in the long run casino could win some money. They dont really have to cheat anything because site is programmed with all those house edge to get advantage over player