Well, Lyft and Uber have large offices here in SF where I now live. And they hire lots of engineers. And Uber, at least, is one of the better paying tech companies in the area. So I can tell you a good chunk of that money is going to bay area landlords! There's never been a better time to have bought a house in 1991 like my landlord did. Barely even pays property taxes on the thing, too.