I wouldn't be in SF running my company if Travis didn't decide to host this poor broke immigrant (me) at his house in 2009 (the JamPad) without asking anything in return. And like me, many others.
He is a nice guy, he helps people, and he has strong passion in hating the failure. Is Uber too aggressive? Maybe yes - but you need to be aggressive to fight regulations, governments, taxi cartels and the like all over the world.