Yeah and then the ads aren't even remotely interesting - most of in-app video ads for me are uninteresting-as-... F2P games (Clash of clans and countless variations - just how in blazes do these actually make money?!).
But what I find even more annoying: that there apparently seems to be no way for the in-app ads to check if I already have a certain application installed. It's wasted money for Deutsche Bahn to spam me with ads for their (actually highly useful) app when I already have it installed... but then again, it's bad for privacy if any adtech company can profile me based on the set of apps I have installed.