Well, according to a study conducted a few years ago, most people actually doesn't give up their information enthusiastically.
https://techcrunch.com/2015/06/06/the-online-privacy-lie-is-...
18 karma · joined July 21, 2016
https://techcrunch.com/2015/06/06/the-online-privacy-lie-is-...
That's all, been doing it for about 17 years now and it works great. Although I drink coffee throughout the day.
I would say its the lack of a conscious choice that makes us using our phones so much.
Sure they track you but in my understanding they actually suck at it. :)