5. The method of claim 1 , wherein the step (a) includes crawling blog posts, which contain at least one link to the client website.
5. The method of claim 1 , wherein the step (a) includes crawling blog posts, which contain at least one link to the client website. 6. The method of claim 5 , wherein the step (c) comprises collecting measurements of traffic referred from a subset of the crawled blog posts.