Recently Google Play decided to display a permanent notification prompting me to uninstall that "dangerous" app because it could "damage" my device. It's impossible to disable this notification.
This app hasn't been updated in years. It has no ads. The only network request it makes is a GET to update the local DB.
My theory is that Google has decided to take into account generated revenue in their risk assessment algorithm. That would explain why FOSS apps are getting the axe while the dodgy commercial call blockers that upload your call history to their servers are still up.