Really? You think a company that likes money says "You know what, we don't need to make any more.". Given that they like money, they're probably afraid of losing money from lawsuits due to breaking regulation.
Plenty of other reasons they might decide not to deal with it besides regulation, such as the large chargeback issue the industry has or pressure from fundamentalist groups that hate pornography on principle.
It also isn’t actually that uncommon for companies to make decisions for moral reasons, for all that we talk of corporations as money-hungry husks they are ultimately made up of people and have their own internal culture. Traditionally they’d eventually be outcompeted by a company who doesn’t have an issue with the action, but given the stranglehold Visa/MasterCard have on the industry that seems unlikely in this case.
