Econsultancy va publicar recentment un article sobre com els resultats de la cerca de pagament dominen algunes pàgines de resultats del motor de cerca. While this increases the overall value and revenue associated with the search engine results page, I'm not that optimistic that it increases the value for the search user.
Here's a screenshot of the “credit cards” search engine results page:
Here's a great infografia de WordStream on the argument of paid versus organic search. While marketers may argue over which one is more impactful, if Google continues to shrink the organic search section there's not much of a debate to have. I think it will be a sad day in online marketing when a great company can't simply work hard to develop great content and get the attention they deserve.