Since Visa and MasterCard are the biggest card payment companies worldwide. It’s not surprising to hear that they are also the most likely cards to be accepted at online casinos. Whereas cards like Discover and American Express are sometimes accepted, but not everywhere.
It’s also possible that while an online casino will be happy to accept your card. The issuing bank or company may not approve the transaction. Transactions tagged as online gambling can be rejected by some banks that do not wish to have their cards used for internet gambling purposes.
This isn’t generally a problem in Australia. But there may be a few banks that do prohibit such transactions. Again, Visa and MasterCard-branded cards are more likely to be processed than others. As the policies on these cards are set by the individual issuing banks.