Yes they really are! :)
Oui. Ja. Si. Ja. Da. Ken. Hai. 是 [Shi]. Já. Haan. Да. Evet. Nai. Tak. Taip. Kyllä. Ja. Ya.
They are actually killing you site and business, that is if you are building a sustainable medium to long-term online business as most people do. If you are into the “trickery” business (like short term with no brand attachments ... ) then unnatural links may still do it for you. (read about it at the end of the article).
Here are a few things on what this articl [...]
In the last months we have been working on an automatic unnatural links classification system. Before going into the details of this new tool, I would like to share with you the challenges that we had in implementing such a complex system. (if you are not interested in those just skip to the tool)
1. User Oriented Concept
The Unnatural Links subject generates a lot of confusion among website owners, webmasters and even SEO professionals. I can tell you that the unnatural link concept is a hard [...]