I am planning to create a linkpush as per this guide (http://www.blackhatworld.com/blackh...push-stop-read-uc-linkpush-my-500th-post.html). I have selected 12 different web 2.0 sites to create my properties on. I have scraped some articles related to my topic and I am going to have them spun so that I have lots of articles to publish. I have also ordered some unique articles on my niche. I was planning to publish the unique articles on the main site that I am working on. Just wondering though, should I publish the unique articles on the first tier or is it ok to publish spun articles on first tier?