It's quite simple really: small scale logistics (per restaurant) doesn't work and it especially doesn't work for low value transactions. It's either too expens

It's quite simple really: small scale logistics (per restaurant) doesn't work and it especially doesn't work for low value transactions. It's either too expensive, not reliable ("we ran out of delivery people, please wait 2 hrs") or just not available at all. Sharing the delivery network across restaurants theoretically allows it to spread the load and solve those issues. The problems come when one company is in control of that network and has a profit motive. The solution here is for restaurants to band together and take control of their logistics.