That's correct. You can only get one plus card, but you can get as many regular photopass cards as you want. So the photos around the parks would be no problem. The ride photos and character meals would be the things that would be a problem. You don't need any ID to use the plus card so you can hand it off as needed for the ride photos. It would be a bit of a hassle to go back and add ride photos, but I think I would share rather than spend another $70.