Still, you get tracked on your interests online. Those get cross-checked with those of your friends, their friends, your age-group, the area you live in, your o

Still, you get tracked on your interests online. Those get cross-checked with those of your friends, their friends, your age-group, the area you live in, your other hobbies, etc. providing useful information. Being in their web has value for them, even if you consciously try to avoid being of value. Making users think they got the better of them is part of the business model. The only way to win is not to play.