Playing for money, or material goods

Is it considered against the rules to offer a game or tourny for cash? Most likely PayPal $$$ ?? Or to bet oh....I dunno, a pound of coffee or a jar of jam on a game?
Not that it would be expected for CC to police or enforce the winnings.....
Just wondering....
Johnny Rockets
Not that it would be expected for CC to police or enforce the winnings.....
Just wondering....
Johnny Rockets