I was going to include Uber, but there's an argument that creating a realtime, massively-scaled fare-setting infrastructure is a moat.

Uber's product isn't rides. Uber's product is being the market-maker between riders and drivers.

Right, but Lyft has the same product. Given enough time, we might see other ride-share companies succeed with the same (yet inferior) tech servicing specific cities.

Austin has a non-profit rideshare business that matches riders and drivers.

http://www.rideaustin.com