I'm not surprised by this a all. I do PPC for a living and I find that a lot of ad spend is totally wasted on paying for clicks that you would have gotten anyway, especially on Google and on Mobile devices. A lot of big brands bid on, and pay for, their brand terms because someone at some point told then that they should. So when a person uses search to find Uber, they get an ad first, then a regular listing second.…
The theory is that if they don't do this, their competitors buy this ad space and steal some of their organic traffic, and/or that they're just bidding up the cost of that space to make their competitors less efficient.
Now, that theory may not be cost-efficient in practice. But it's not like the marketers didn't understand that someone searching for the name of our app were going to see it in the list anyway.