I do recall back in the late 80's (88-89?) I had an AMEX card that got miles or points and for some reason my brother could not get AMEX. He was living and working in Russia at the time, and they accepted that card. We signed him on as a joint card holder and he earned a TON of miles on the account because everything he did was an expense that his company paid for.

Well, shall I say, I earned the miles. And he said, You can have them. Just get me back someday. I did, with tickets to something somewhere a bunch of years later.