Absolutely fucking astounding
So, I do have an Apple ID, so I signed my own account into the Apple TV.
Although I successfully made a digital purchase with this Apple ID five days ago, when I attempted to rent on the Apple TV it said my credit card was expired. It attempted to charge me in USD, so probably it was using a very, *very* old card.
You cannot change your apple ID payment information on the Apple TV. You have to use an iPhone. What if I don't have an iPhone? (1/2)