More than one person sees the screen.

The average ride carried 1.4 riders: often a pair, sometimes a group. An in-vehicle screen in the back seat is seen by whoever is riding, and a wrap is seen by everyone around the car on its way.

Drivers keep less than the fare suggests.

After fuel, wear and other costs, the driver in this study kept $8.15 an hour on average. That’s why income that doesn’t depend on the next fare matters to drivers: screens and wraps pay them for the car they already drive.