I know Rollbit.com calls itself the most rewarding crypto casino--but is there some actual proof comparing all the different crypto casino websites together?
In the case of marketing strategy, any site are free to claim themselves as bla bla bla but players are those who decide whether the claim is true or not.
There are many casinos out there that claims themselves as "the best", "number one", etc so I can say that it is a normal practice by casinos to attract players.
What you need to do is to find it yourself which casino suits your needs/preferences.
If you are looking for rewards offered by casino, you can simply compare it yourself by visiting them one by one.
Experience will tell it all. Though all casinos claim to be the best for all gamblers, but it differs actually when you come to experience not only through their games and bonuses offered, but also on how they treat their customers through their customer service as it could be another factor that will make them the best from all casinos.