While I was doing some research I found a technique used by some of the affiliates. using keyword rich page (junk content) with lot of aff links to a product, the search engine listing these pages as pdf but ultimately they will be redirected to some affiliated product. I wonder how these pages get thru to top the list even after lots of updates.
Do these marketers upload this pdf (with aff links), get indexed and then iframe the links??
Just search for any CB product+author+review or pdf ...you'll get a whole list of webpages like !#$$%-!@#$%.info/Bv-Cures-By-Kristina-Tomlin.pdf ultimately redirecting you to affiliate hop links