I think a service with a restricted, simple menu could hit the $6-8 pricepoint for regular pre-orders, and that would be enough to get many people over the line

I think a service with a restricted, simple menu could hit the $6-8 pricepoint for regular pre-orders, and that would be enough to get many people over the line. If you further sold them a larger order giving enough for lunch the next day, you could get more value out of the delivery cost.