Doordash and uber eats take a 40-50% cut from the restaurant when a driver delivers the food. Other platforms take 20ish percent if the restaurant does the delivering. I'm sure you could establish some kind of self hosted network where each restaurant runs their own machine that provides some of the compute. It would have to scale really well with such a decentralized system. You'd probably have to let the restaurants individually decide the amount they want to pay the drivers, and even then it would take a long time to build up a network of drivers. I think there would be a lot more problems with a decentralized approach though as you'd now have to let restaurants figure out disputes with drivers and customers when food goes missing and things. Pros and cons, and a lot of effort.