I'm creating blogs specifically for linking to my main sites to build SEO. 1. These blogs are niche related and have niche related named URL's 2. I'm using two different article spinners to post ONE unique article throughout 10-15 blogs. Linking to main site 4-5 times in article. 3. Will posting others articles (like from ezine and such) hurt my blogs since it would be duplicate content..? I'm trying to build the content of these blogs since they are a bit bare and just created. OR should I just post unique content from my own article spinners? I know we are all using this method cause it works great.