In online casino gambling, the fundamental target is to make huge bankrolls and win as many pots as possible. Irrespective to whether your win being big or small, at some point or another you have to collect your win, there are many ways of obtaining your wins, but most are dependent upon the financial support the online casino has in its bank balance the first place.
If you had initially paid the online casino account with a credit card, in this case, most casinos are likely to give your wins by first crediting the initial amount you had spent directly to your credit card and then later, send a check for any amount above it, it usually takes a week or more for it to be received. In the case of a money order or check used initially, then the casino would also send your winnings and deposit by check. Wins that do not exceed the original amount are more likely to be kept by the casino in your account for further deposit. These rules applied in these cases would be exactly printed and spelled out in the user agreement that you would have signed beforehand.
Since, the initial and original funding means used is highly important, as it determines the way you would be paid by eventually, it would be wise to choose appropriately to fund an account at an online casino. If your aim is to pay off the credit card, the best choice would be to fund your online casino account with the credit card as the casino will credit that account. If you want the money to be part of your bank account then you should fund your online casino account with a check and hope to win big.