I have a general idea of how it works or could work, which is why I gave the example of retargeting. But is there proof they actually do it and it's "at the hea

I have a general idea of how it works or could work, which is why I gave the example of retargeting. But is there proof they actually do it and it's "at the heart of their business model"? There was recently an article on using HSTS as a sort of super cookie. Yet it doesn't seem to actually be in use[1]. There is a lot of rumour around Google. For example that they use Google Analytics data for ranking. Yet it rarely comes with any proof. [1] https://news.ycombinator.com/item?id=8831148 https://news.ycombinator.com/item?id=8831148