Quote from the recently leaked Google Guidline Manual:
http://brighthouseremotes.files.wordpress.com/2011/07/general_guidelines.pdf
5.1 Thin Affiliates
A thin affiliate is a website that earns money from affiliate commissions. It exists only to make money. The spammer shows content from other “real” merchant sites, such as Amazon or eBay, or a good hotel or travel website. When users click on links to buy products or make reservations, they are redirected to the “real” merchant page.
The thin affiliate offers no additional information and does not try to help users. This is a moneymaking spam technique. [SOURCE] Page 105
http://brighthouseremotes.files.wordpress.com/2011/07/general_guidelines.pdf
5.1 Thin Affiliates
A thin affiliate is a website that earns money from affiliate commissions. It exists only to make money. The spammer shows content from other “real” merchant sites, such as Amazon or eBay, or a good hotel or travel website. When users click on links to buy products or make reservations, they are redirected to the “real” merchant page.
The thin affiliate offers no additional information and does not try to help users. This is a moneymaking spam technique. [SOURCE] Page 105