Not sure that's true, actually. The usual strategy appears to be to comp the gambler with generous stays at the casino they're a patron of, with the expectation

Not sure that's true, actually. The usual strategy appears to be to comp the gambler with generous stays at the casino they're a patron of, with the expectation that they'll dump their winnings back in the next day. Taken with a grain of salt, as my only knowledge of this is via Hollywood movies. It does make sense from a game theory perspective though.