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Apple Confirms Governments Using Push Notifications to Surveil Users
(www.macrumors.com)
This is a most excellent place for technology news and articles.
Eh, I use a few apps that have true foss forks and thus don't use gcm but the keep-alive method, and I didn't notice a difference in battery when I made the switch.
Also lol #3 isn't exactly a "burden", take the hint and go away people. Let me live in blissful solitude.
Pretty much my experience with pull-based notifications. I've even tested the same client on the same setup against both NTFY and client-pull without seeing a noticable difference in battery usage.