crobb305 - 2:57 pm on Jul 31, 2013 (gmt 0)
I do know that none of the first 50 similar sites link to mine according to GWT
The similarity isn't necessarily because they link to your site, but that they share a similar backlink profile. For years, I used this tool to try to find other websites that were chasing my backlinks. I deliberately wanted to have a different backlink profile, because I felt that, like unique content, the backlink profile should be unique. Backlink chasing was such an obvious form of link acquisition. When I look at the related sites in my niche, the top results seem to be the ones that have been most heavily penalized over the past couple of years. As I surf down through the results, I see more of the pages that routinely appear in the search results on various queries.