The answer: tech bros dictating that they need more “engagement” e.g. they need to collect more data so they can either sell said data or get acquired. I guarantee you very few mobile developers want to send you a notification of any sort, much less “why haven’t you used the app.”
I wish they estimated how fucking annoying their interventions were. Like you might be boosting clicks per minute in the short term, but it's going to go down to zero after a week when I get fed up — when Netflix started auto playing videos, I threw my TV out the window.