This is specially true for any kind of news websites or blogs, where it's obvious what content a specific URL contains. The fact alone that a visitor is on that page makes him the best candidate for a targeted ad which refers to the content of the page.
No need to have over a dozen of trackers on that page so that advertisers create a profile of you.
The problem is the audience is global as well as the content in many cases.
My local Hearst paper operates a templates website full of crap trackers and ads that are brokered at a central point. They aren’t selling the inventory with local sales managers etc. To keep costs down, everything is aggregated.
No need to have over a dozen of trackers on that page so that advertisers create a profile of you.