I thought about this for a minute, then I thought "who cares". If I go to someone's web site and they set my amazon recommendations to buy their merchandise that they are setting, couldn't they have just showed me the same thing on their site with a link to Amazon? Couldn't they just as easily redirected my browser to the amazon page or tried opening up a popup to go to their produce there? amazon's recommendations are based on what you viewed or searched for last. How often do you go to amazon to find something to buy? I go there to find something I already know that I want - and I then search for it.

Seeing their recommendations for some merchandise that I also saw on a different website earlier does not affect me in any way, in fact I don't even look at the recommendations. I type in what I am looking for and hit enter (boom, old recommendations are gone).