This is probably quite an old question but after some searching i'm not quite sure I understand if I should or should not be adding a no follow tag to my affiliate links? I am a product based marketer so I put up products on my sites for various merchants. I cloak them using GoCodes, so my URL will look like: http://sitename.com/go/product_name . Should I be adding a no-follow tag to these? Are these links serving as backlinks to the merchant I work for?