If most users opt out, then an analytics SDK becomes effectively useless. You're ranting about the possibility of using an analytics SDK - which nobody is denying, because it's a "de facto" ban, not a "de jure" ban. But an analytics SDK that gathers almost no analytics is not even worth having. So in effect, it's a ban.
> All they will have to do is indicate third party tracking in the App description and present an opt-in dialog.
Oh, that's all. And then get no analytics. But they can still "use" the analytics SDK... to do nothing.
You know, I don't even have any analytics whatsoever in my apps. I have no horse in this race. But I've got no problem with the phrase "de facto ban". It seems like a reasonable description of the situation. And again, some people would love a de jure ban, so it's not like the author of the article is using a "naughty" word.