If you can order an MTO at a touchscreen you should be able to pay at them as well. They already have the card slide built in, so make it possible to take payments so you don’t have to go to the checkout.
One reason I love going to subway it flatbread, if sheetz added flatbread for subs, it would be perfect. And since the touchscreen prints a receipt anyway, why not just make the payment there instead of walking across the store twice? It makes sense
Get rid of the touchscreen menus that no one with clean hands wants to touch. That's why I won't order there.