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I am working on a large ecommerce site right now. I am adding a blog to the site for content purposes. I have been going back and forth on this question, and wanted to get your opinions. Should I integrate the blog into the ecommerce site with the full ecommerce header and/or sidebar, or should I have the blog just be a well designed theme and strip all the ecommerce functionality for it. I would think that people would be more apt to share and link to content if it wasnt surrounded by links to product category pages and the like. Thoughts?

I was doing some research today and kept coming across this site sylvane.com I checked OSE and found that it only has a DA of 37 PA of 35, and only 79 linking domains (966 links total). I got to looking and there are a few links like this http://lulala.us/twxoops/html/userinfo.php?uid=303 Anyway, accroding to SEMRush, this site ranks for over 6,000 keywords. I ran content on a couple of their high ranking pages and the content is not unique, at least not very unique on the pages I checked. What is so special about that site that google is giving it so much love? I am not trying to call them out, I just want to know what this site is doing to garner the favor of google when I have a site in the same niche with a higher DA, PA, linking domains, and social signals.