You mean like Lyft, who's been around as long as uber and raised billions of dollars? Or like SideCar, and other companies, who have been left in Uber's wake?

You mean like Lyft, who's been around as long as uber and raised billions of dollars? Or like SideCar, and other companies, who have been left in Uber's wake? While not the same, I think Uber has similiar network effects to EBay. Uber recruits drivers and riders and acts as the market for the matching between the two. Riders want their driver to be close by, and drivers want their next rider to be close by- meaning the market with the most drivers wins big. Sure, drivers and riders could install a different app- but what's the incentive to do so? Buyers- sellers of old collectibles could get off eBay, but they haven't yet, and why would they start now?