This quiz if focused on the items shown in the picture, specifically Budget and Avis. (Judging from the Twitter answers, that was unclear.)
Frequent travelers often rent cars. This involves picking up the car and eventually returning the car. Google could automatically track where you began your rental (in my case, Avis). When you want to return to the airport, instead of directing you to the airport terminal, it could automatically guide you back to the rental car return. One way to do this is to use GPS trace data. i.e. look at the paths of people who have rented from Avis and look at where they return the car.
Bonus points for showing me the last gas station on the route so that I don’t get stuck paying $9 a gallon to have the car rental company refill the tank. (Travel tip: You should almost never accept the prepaid fuel option.)
Some Twitter answers that reflect other issues with Google Maps.