For the last couple of years, I sold fuel for corporate business jet charters. One of my clients would pay for his fuel with an AA Citibank Visa card. A flight from the west coast to Europe was an easy $15k charge, and he did that regularly. He would then use the AA points to move his crews around when he had to -- the pilots did not keep the miles.

Does anybody know if there are limits on the amount of points he could earn in a year? (As an aside, one of the pilots told me they had to pay off the balance multiple times per month to keep up with the charges they were making.)