by Matt Stoller
The Guardian, Mon 9 Sep 2019
Google and Facebook are the subject of large antitrust investigations. This is good news for our democracy and a free press
The most important input for an advertiser is knowing who is watching the ad. If you know who is seeing an ad slot, you can charge a lot of money to tailor it for that person’s specific interest. If you don’t know who is seeing an ad slot, you can’t charge very much at all. Google and Facebook know who is looking at ad slots everywhere and what they are interested in, so they can sell anything any marketer needs.