Page is a not externally linkable
-- Google SEO News and Discussion
---- Google Updates and SERP Changes - September 2012
Sand - 2:33 am on Sep 13, 2012 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4490381.htm
Not sure what difference it makes for the purposes of this discussion, but ~15%. And it's not ecommerce, a conversion is defined as a user registration.
Brought to you by WebmasterWorld: http://www.webmasterworld.com