Interesting, 1 thing to add on that hypothesis, right around April 2010, Google dropped a lot of pages from its index. That really messed up SEO play companies.

Interesting, 1 thing to add on that hypothesis, right around April 2010, Google dropped a lot of pages from its index. That really messed up SEO play companies. As a proof, search on any seo play company on Alexa around April 2010