Page is a not externally linkable
-- Google SEO News and Discussion
---- Does tagging URLs with reference parameters affect SEO?
indyank - 10:47 am on Jan 23, 2013 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4537929.htm
But these ref parameters are quite often used by many sites including Amazon. A proper study on how they do it will help.
Brought to you by WebmasterWorld: http://www.webmasterworld.com