Oh, it is.
The fun thing is I went to Taco Bell last night. An order To Go.
I got a promotions meal, plus several other items. Customized my food request (done correctly too) plus upsized the drink.
BEFORE I ordered, two young guys were using the kiosks (2) which faced in opposite directions. So they started before I did. I placed my order, got my drink, filled the cup, drank and refilled, got some napkins, some sauce packets, a lid and a straw (PLASTIC!!!) then picked up my order.
Those two young guys were still trying to complete their tasks on the kiosk. IOW, their orders weren’t even submitted yet. They were still standing at the kiosks when I went out the door with my food.
Ah, modern technology.
But you are correct, $15 will cause more of them to be deployed.