A lot of people think if their Uber/Lyft ride is cheaper than their traditional taxi because it's subsidized. The lower fare for the most part is due to extreme efficiency difference between a taxi company and Uber/Lyft.
1. Uber/Lyft don't own the cars. They are leveraging car owners capital
2. Uber/Lyft drivers are more efficient because they don't have to roam around the city to find a passenger and they get notifications for when to work. The system scales up and down on demand. No taxi company that owns cars can do this.
3. Uber and Lyft are more convenient for the passenger and it makes people to use them more. I can definitely see myself and people around me to use Uber/Lyft way more than taxi since they came along.
Uber and similar companies are purring cash into this growth because at the end of the day they can make a profit because they are more efficient. And no, it's not easy to make a clone. The network effect is huge!