Giving the founders 20-to-1 voting rights over regular investors while losing as much money as they are is insane. This really looks like a lemon, and the VC's want to cash out and leave public investors holding the bag.
I don't see how self driving cars are going to help them. Waymo and Tesla are both the farthest along, and they're going to run their own networks - competing against Lyft and Uber.