At least giving way for paid upgrades should sort of fix that, giving developers genuine motive not to produce this crap. I have been annoyed by upgrades to ap

At least giving way for paid upgrades should sort of fix that, giving developers genuine motive not to produce this crap. I have been annoyed by upgrades to apps that litter screen with triggers to buy new stuff. For example flightradar24 I bought a full version of the app. In an update they positioned tiggers on every city to get me to buy upgrade for every city to view departure and arrival time. Suddenly my app is visually broken and I have to pay for the upgrade to fix it. And I can't even downgrade. I really don't care about departure/arrival schedules for airports... this does not seem right to me. I guess that breaks one of the core rules of the interface design - of least surprise. (or recurring one that turns into a severe irritation).