No the casinos won't pay you on your card if you win, however you can reload the card at a store or with another card yourself for $2 or so as opposed to buying another card which cost $9 or there about. But the casino can't or rather won't credit your card they pay out by their terms whatever they may be? But as you have learned the hard way not to use your atm card on line, a prepaid card is safer as if it is stolen the person can use only the amount on the card if they are able to use it.