On July 4 2010, Rob Hayes' family was not happy with him. He spent too much of the holiday on his phone, trying to organize an investment in a new, unproven startup. Hayes had learned about Uber a few months earlier when he saw a tweet about it from Garrett Camp. Camp founded Uber; he also ran StumbleUpon and sold it to eBay. Hayes' firm First Round Capital (FRC) had backed StumbleUpon. Hayes emailed Camp to ask what Uber was. Uber, Camp told him, was a startup that promised to solve transportation problems in San Francisco.