That‘s not what an economy of scale is, that‘s branding. An economy of scale would be Uber saving a portion pf costs as it gets bigger, but that‘s not really possible because the per unit cost of a ride is tied to a driver, and they‘re not pushing drivers into driving buses or other vehicles that can carry more shared trips.

You could achieve the same thing Uber achieved with branding with a franchise; McDonalds maintains quality across franchises despite not being involved in the day to day operation. And McDonald‘s certainly doesn‘t lose money on every patty sold.