I don't think GGGP was complaining about the price. I think they were complaining about it being a non-disclosed fee (like tax) while also not being a clearly defined amount (pseudo-tax) and with aggressively bad consequences if someone doesn't go along with the mind game (deliverer eats the food, wastes an hour of your time while you're hungry, need to follow up with support, etc) rather than just an up-front rejection.
Obviously nobody wants to order food on ebay, and if you're going to argue that an auction is the only possible outcome why wouldn't that apply to the restaurant itself too? The restaurant could aggressively underpay/understaff chefs, then you go to pick up the order and restaurant says "Oh someone else offered to buy food at a higher price, but feel free to order again and offer more, and sit here for 30m while we prepare it!"
Obviously nobody wants to order food on ebay, and if you're going to argue that an auction is the only possible outcome why wouldn't that apply to the restaurant itself too? The restaurant could aggressively underpay/understaff chefs, then you go to pick up the order and restaurant says "Oh someone else offered to buy food at a higher price, but feel free to order again and offer more, and sit here for 30m while we prepare it!"