I drive for Uber, the one thing that doesn't on the surface fit is, actually paying a 40 person team enough to get them to jump ship. Uber is dirt cheap, ask a driver how they cut the fare rates and the drivers income regularly. I would have guessed with the success with Google's autonomous driving fleet et al, I am surprised they didn't partner with Google.
Then again Uber is all about being vertically integrated and trying to own everything but the car in the equation, there by scoring all the benefits but mitigating legal exposure at the expense of the drivers. Automated cars will allow them to further reduce that, but as they are starting out at zero they will have to spend a lot of cash to make up the distance Google has already, and Uber doesn't strike me as being that smart, cheap yes but they seem to think they can make shortcuts with out consequences. personally I hope Google comes back with a Google cab to counter Uber.