Earlier quoted context omitted.
I remember following Groupon closely and feeling like Groupon was spending a bunch of money teaching people around the world how to use daily deals, only to have competitors come in make it a race to the bottom because the barriers to entry were so low. I feel like Uber is doing the same: spending a bunch of money teaching people how to hail a cab from their phone. When competitors like Lyft, Hailo, and Via enter the…
Groupon doesn't have a network effect. Uber has a VERY strong network effect. In fact, it has the type of network effect that can keep its advantage over competitors (see Facebook versus Google+).
If a yellow cab owner from NYC decided to expand to Tucson or Kansas City, you'd expect him to do okay with his background in the ins and outs of the business, but expecting total domination based on his knowledge of NYC market is bit of a stretch.