This is a question that has always puzzled me. I see casinos, Harrah's in particular, remove attractive but losing paytables (9/6 JOB, NSUD etc.) from all but the highest denominations ($5, $10, $25). I read that well known advantage players are working these plays. I assume they are playing at advantage when cash back and bounce back are taken into account or they would not be playing them.
My question is this: Why would those casinos offer advantage plays at large denominations but not at quarter or dollar denoms where the risk of offering them is less? Are these casinos betting on the premise that those players really are not sufficiently bankrolled for the plays?