Sources: Google, Infrequently [Google Chrome Engineer]
quote: What I was saying: Google is giving Android away for free.You can use, modify and do whatever you want with it and don't have to pay Google anything in whatever form you want. ONLY if you want to use the optional Google services like Maps, Store, ... you have to accept some restricitions, otherwise, Google is giving it away for free and nothing is misguided.
quote: If you're lazy and turn on Cookies, remain logged in, ... only then Google/Facebook/... is able to track you. You can surf in private mode, or just don't use the comfort functions like always logged in.
quote: No ad company can track you across more than 1 session or even more than 1 browser window. But people are lazy, people enjoy using the like button on each site, that's not an issues of Google, but of the people. I'm free to not use and even block it, and you know what? I blocked it.
quote: Amazon, MS, Apple, Facebook, are just too large and popular to change this.
quote: So as long as you can use on Android whatever software you like, and as long as Google publishes the source code of the latest iterations and as long as you are free to use it without Google, there's no reason to fear.