Uber Plans to Advertise to You at Every Stage of Your Ride, Using Your Own Data
gizmodo.com
gizmodo.com
The ones I've seen have stupid little games with ads every minute or something. If you play them often enough, apparently you can win money. Drivers make up to $100/month for using them.
And sorry, Lyft, for unfairly disparaging you; too late to edit now. But, not unlike your competitor, you'll soon do something that will make me feel justified in my disparagement. ;-)