This is MITM and in many respects extremely unethical. I admit that the premise is clever but it’s little more than ripping people off. There’s no value add to the customer that I can see.
It's supposed to help restaurants with admin and delivery stuff, which, in turn, would make it easier for customers to order and maybe even provide faster delivery but, in its current implementation, it's just a way to skim money off of the restaurants.