I haven't read the comments, but as you said it's American traffic, still are they coming to you directly from Google and through appropriate targeted keywords, or from your friends, and their friends on Twitter and Facebook? More likely, as some of your posts tell me that you are not perfectly using right SEO techniques.
And 0/100 is a quite common phenomenon online.
Most will go to Amazon directly to buy what they want, after reading the reviews and feedbacks on major aff sites. Does your site have the capability to make them pull out their purses immediately and without thinking twice, btw?