I'm not sure what point you are trying to make. These pages talk about how the ordering of marked adverts appear in results, not non-advert search results.

Having said that, I think it's clear the quality of non-ad search results isn't great, but I don't know if that's due to perverse incentives on Google's side or just the increasing sophistication of SEO defeating Google's relevance ranking.

> I'm not sure what point you are trying to make. These pages talk about how the ordering of marked adverts appear in results, not non-advert search results.

It also describes the situation as it is now, not how it was when Google still cared about search results. The paid ads didn't use to be part of the search resuls list at all but instead were clearly delineated.