Case: Mobile CPA for BlaBlaCarApp for travelling with drivers who have empty seatsChallenge: More active users (passengers and drivers).GEO: Russia.Platform: Android.Solution: Testing different sources: in-app ads (video and banners). As in-app video performed best it became the main campaign source. We used a number of creatives with the photos of drivers and passengers with actual prices.Results: > 25k registered users within 6 months, 60% passengers and 40% drivers.