Originally Posted by
ibelieveindisneymagic
This is a really good question! I had to do some digging (I was very curious about the answer) and it appears that YES, they can use their "ticket" to pay for items. Deep in the Disney site it says:
You can use your MagicBand or card to:
Unlock the door of your Disney Resort hotel room.
Enter theme and water parks (with valid admission).
Connect Disney PhotoPass images to your account.
Charge food and merchandise purchases to your Disney Resort hotel room (only available during your hotel stay).