What is Uber? Forget the sharing economy – it's just a libertarian scam | Dominic Rushe

There are plenty of reasons why Uber's much-hyped share sale might fail - and many more why that could be a good thing

Serf, noun: a laborer bound under the feudal system to work on his lord's estate.

Uber is a lot. Last year 5.2 billion people took a ride in an Uber. And the company lost an average of 58 cents on each ride.