I work a a major advertiser in a domain that gives me fairly in-depth understanding of ad-tech. In general most big advertisers don't really really care about

I work a a major advertiser in a domain that gives me fairly in-depth understanding of ad-tech. In general most big advertisers don't really really care about your name, address, email, phone, IP etc and generally take pains to see such data doesn't enter analytics datasets. They do care about demographics and interests in an anonymized manner because face it, showing a sanitary napkin ad to a guy is typically neither going to be liked by the guy, nor is it a good use of the advertisers money which belongs to its shareholders. In general outside the walled gardens tech stacks are setup in a way that you cannot ever be personally identified.