John,
He might also have been an employee from another casino. I don't know how it works there, but in MS, "technically" if I am playing somewhere and I am obviously overpaid or something like that, I am required by the gaming commission to give it back if I notice it. If it's obvious to them that I knew what was going on and still kept the money then I could lose my gaming license. Or at least that's the way everyone I know interprets it here. I think if it was an employee from another casino it might have also just been a "professional courtesy" to return it so that poor dumb bas***d didn't get fired. <G>

--Thom