People make money off some advertising that doesn't/couldn't do tracking at the individual level. Why must internet ads include tracking of individuals? Just be

People make money off some advertising that doesn't/couldn't do tracking at the individual level. Why must internet ads include tracking of individuals? Just because they can? 2 companies could work out an agreement to show a static image that links to a specific page somewhere for some amount of time for a certain price and it could be hosted in the same domain as the content. Granted, it's not as convenient as the drop-in scripts. New sites would have to prove themselves before anyone would want to advertise with them and known sites would have to keep producing quality content if they want to keep their high paying advertisers. Maybe there's a third-party that collects a small fee to verify agreements are being followed if trust hasn't been established or comes into question.