The same motive. This isn't even a secret conspiracy, their ToS says they do it and says that is why they do it. The more data they have on you, the more ad mon

The same motive. This isn't even a secret conspiracy, their ToS says they do it and says that is why they do it. The more data they have on you, the more ad money they make. Why do you think the ads you see in a search just happen to contain items you were just emailing your mother about a day prior?