In the context of VPNs for example. Some VPNs store and provide information about what sites you go to third parties. Third parties analyze it and figure out what adds to show you. Hmm… then let them show me those adds they want to show me. I do hate adds as a whole and use an add blocker, thus. But I couldn’t care less what particular type of adds they show me, they are still adds.
Someone knows what sites I go, what then. If someone curiously inquired me on this type of information I’d tell them without giving a second thought. Incomparably larger amount of data I put out just by making comments and posts.
I mean the “P” in VPN stands for “private”. One would hope that carries some actual meaning.
If you’re so willing to give up your privacy then that’s your call. Some of us cherish our privacy and our freedom and don’t want corporations or the government being able to easily know anything about us without our explicit consent, if at all possible.