Comment by charcircuit
1 year ago
The reason why all adspace isn't priced equally is because of tracking either done by the seller of the adspace or the buyer of the adspace. This has been the case for hundreds of years. The buyer wants to make sure that their ad spend is reaching the maximum amount of people who are likely to end up in an conversion.
We are specifically talking about individual-level tracking in this conversation. You can also track the efficacy of an ad by, for example, placing a special link in the ad and watching how many people use that link, but that's a completely different subject and not what we're talking about here. That type of "tracking" is not dependent on whether website users are logged in or surveilled in any way.