martinibuster - 2:22 pm on Mar 8, 2013 (gmt 0)
This was a do-follow "contextual" link selling network. They placed do-follow links within the body of blog articles. What I find interesting about it is that it was unnoticed for so long. Possibly because Google is organized in a top-down fashion, with English language decisions at the top and other languages more or less under the radar?