I don't believe they forbade such transactions, they persuaded the CCs, so to speak.
I see that you are replying to my comment at #10. If you read it, you will see that I said just that. Here it is again should you decide to read it:
The precedent was set when they banned the sale of online cigarette sales by forbidding credit card companies from allowing the transaction.(Perhaps forbidding is too strong a word, because the credit card companies agreed to this in exchange for some favor, but I can't remember what that favor was.)
Then at #212, freeper BritExPatInFla, posted that the favor was bankruptcy reform, which is exactly correct.