Receive a free ride with Uber and UberX (as well as all other forms of Uber) by clicking on this link to sign up or by downloading the Uber App on Apple, Android and Microsoft devices and phones and entering in the following code: uberFreeRideOffer

This is technically not a discount and no printed coupons are necessary - instead, this is an on-going offer to simply receive a free (yes, free!) ride on Uber - just use the code and enjoy!

When you take a ride from Uber, or when you consider driving for them, you'd better check any Insurance issues if you feel this is important. From Wikipedia:

"On September 17, 2014, California's Governor approved the "Assembly Bill No. 2293" bill that will become effective on July 1, 2015. The bill will amend "the Passenger Charter-party Carriers’ Act to enact specified requirements for liability insurance coverage for transportation network companies, as defined, and their participating drivers." The driver under the new law is defined as "any person who uses a vehicle in connection with a transportation network company’s online-enabled application or platform to connect with passengers." The stated minimum insurance requirement ranges from US$50,000 to $100,000 for death and injuries per individual or incident, and stipulates US$30,000 for property damage. As a breach of the bill would be classified as a criminal act, a corresponding "state-mandated local program" will be implemented."