I don't think casinos offer better chances at winning at first. If that was the case it could be exploited easily.
If someone wants to be certain that his rolls are fair and worries too much of things like this, then he can gamble on probably fair casino games.

I think the more realistic issue with luring in players is how easy it is to win on no-stake rolls and fun token rolls. In non provably fair games this can be a real issue.