There used to be a hidden list. I was the head of android dev for flock , a team messenger and we had gotten in touch with OnePlus who added us to the whitelist

There used to be a hidden list. I was the head of android dev for flock , a team messenger and we had gotten in touch with OnePlus who added us to the whitelist. More details here : https://hackernoon.com/notifications-in-android-are-horribly-broken-b8dbec63f48a https://hackernoon.com/notifications-in-android-are-horribly... Though they were moving away from that model to a model where apps alive for more than a certain time interval in background were killed. So apps which you use the most heavily are more likely to be penalized.