Internet economy already made a full circle with this once before: at first, ads existed to sell things online for advertisers, and make money for publishers (also as a machine for circular deals to propel stock valuations, during the dotcom boom). Then they became so pervasive and annoying that eventually they just became a method of making user experience worse, and get paid for ad-free, thus making money. Today, no one cares about performance of those ads, they are just a replacement of "nag screens" of the shareware era.

It sounds like AI will made this circle a lot faster.