If we have a Disney Rewards Card on file connected to our stay, can we use that to pay for
Genie+ or $ILL purchases?
I assume you mean you have a Disney Visa Rewards Card (which holds rewards you accumulated by using the Disney Visa credit card), which works like a gift card. So you can save the number in a note on your phone and copy and paste it in the relevant place when buying Genie+, ILL$, LLSP, or LLMP.
As far as I know, you cannot link it to
MDE like a credit card, and you can’t link it to your Disney hotel account so that charges to your room are automatically paid by that card. You can visit the front desk periodically and use the Rewards Card to pay down your room charges.
If you mean you have the Disney Visa credit card, it must be linked to MDE, and when you buy Genie+, ILL$, LLMP, or LLSP the charge will go directly to that credit card. You can have the same CC linked to your Disney hotel account, but Genie+, etc., charges don’t go there.