free-ride, freifahrt

In the city of Düsseldorf (:D), there is an application that allows mass-transit goers to generate bus and tram fare in exchange for a few moments of inattentiveness and letting a few advertisements play on one’s mobile device. Because of few paying sponsors so far, the new service is finite and can only issue a certain number of free ticket per day and has proven wildly popular but that ought to change as more become involved. What do you think? If fare could be redeemed as cash, passengers could technically earn over one hundred euro an hour, but surely the demographics gleaned is even more valuable to marketers and more effective—despite the potential for ignoring them—than traditional billboards and posters.