the revenue model of uber's explosive growth :

UBER COMPARED  WITH OTHER UNICORNS

Uber’s rise has been extraordinary, from  start up in 2012 to worlds biggest unicorn in  2015, In less than 4 years years Uber has  created and nurtured a  commodity like " Taxi hailing service"   and made it into one of the most envied start up giant in less than 4 years

• Today the uber economy straddles  the  most parts of the world which powers the $40 billion ride-hailing  aggregator service 
• Uber was founded as "UberCab" by Travis Kalanick and Garrett Camp in 2009 and the app was released the following June. 
• Uber expanded internationally for the first time
  in 2012. In 2014, it experimented with carpooling features  Klout ranked the San Francisco-based company as the 48th most powerful company in America in 2014
• By the end of 2015, Uber was estimated to be worth $62.5billion. Uber has received  funding worth  8.61B in 13 Rounds from 52 Investors.( crunchbase data)
• Among the early investors were Google Ventures who invested $258 million in 2013. The Chinese search engine Baidu has invested over $1.2billion and Fidelty has invested a further $1.2billion in Uber