In message , at 12:01:29
on Mon, 26 Sep 2016, David Cantrell remarked:
It's possible for Amazon to kill the competition and for it not to come back
again, leaving you in an unassailable position to reap the rewards of
previous work

Once Uber has established in a city, competition can continually spring up
again meaning that you are continually fighting it. There is no path to
killing it off completely (other than making your price so low you don't
make a profit). There are always new drivers prepared to compete with you.

What's different about them that makes it possible for someone to pop up
and start competing with Uber, but impossible for someone to pop up and
start competing with Amazon?

Mainly that Uber's buyers are only dealing with one commodity - drivers,
and their product is self-delivering. Amazon has tens of thousands of
product suppliers and tens of thousands of people required for
picking/packing and delivering them.
--
Roland Perry