They still have to deal with it. For example, a previous company I worked at valued every customer service call at ~$13. If it was a <$10 problem we would simply offer to refund the customer in full online, no questions asked.
Wouldn't that only affect the issuing bank, rather than the card processor? The card processor would just process a chargeback like any other CC transaction.
So I could see why issuing banks may not want to support adult content, but then there could be a porn friendly issuing bank that may charge higher fees or something.
