That might've been true 20 years ago, when fine-grained individual data was expensive for marketing teams to store, organize, and access. Nowadays that's dirt-

That might've been true 20 years ago, when fine-grained individual data was expensive for marketing teams to store, organize, and access. Nowadays that's dirt-cheap; advertisers absolutely do track you on a very individual level. Yes, they also correlate you with other individuals based on various demographic buckets, but those buckets are getting tinier and tinier.