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Re:Show HN: How I turned an old book into a (barely) profita... by rmc on Thursday December 27, 2012 @01:42PM (#4974472)
For exactly this reason Wikipedia adds "nofollow" attributes to all external links on Wikipedia. You will get no SEO / page rank link juice from adding links to Wikipedia. You will probably get organic traffic though.
Re:Show HN: How I turned an old book into a (barely) profita... by JonnieCache on Thursday December 27, 2012 @02:36PM (#4974699)
Duh. Can't believe I forgot about that. Not really on the ball today. What am I even doing here? This is meant to be my holiday...
Re:Show HN: How I turned an old book into a (barely) profita... by matznerd on Thursday December 27, 2012 @03:12PM (#4974814)
Just because a link is "nofollow" does not mean you get no juice. Being linked to from wikipedia definitely helps a site's rankings...
Re:Show HN: How I turned an old book into a (barely) profita... by vicks711 on Friday December 28, 2012 @10:41AM (#4978056)
Argument that "nofollow" = "no seo juice" is debatable. Many SEO believe that lots of links from Wikipedia does help.

I have no data of my own to support the above. Theory says that "nofollow" will not help is SEO.