Dealer tipping... why?

[luckycharms]

Money takes on a special quality when it enters a casino. Five dollars could turn into five hundred in the course of a few rolls of the dice. On the other hand, a thousand can turn into zero. How does this affect how people handle their money in a casino? As a five dollar tip could cost the tipper hundreds, do patrons of the casino not tip at all? Or do they tip profusely, since the money's probably going to be lost anyways? What type of player tips? The by-the-book player with higher expectation or the gambler just looking to have some fun? Do players tip more when they're winning? What do dealers do to elicit more tips? What does the tipper receive in exchange for the tip?