I don't think this addresses the question directly, but I'm sometimes an Amazon seller and I just received an email from them mentioning a few ways to improve your traffic. Not exactly Amazon tricks, but maybe helpful, so here it is:
• #AmazonCart allows you to promote Amazon listings on Twitter and help drive sales. Customers can add products they see on Twitter to their Amazon.com shopping carts without leaving Twitter.
• Create a Promotion: Adding an incentive—such as Buy One Get One, a discount, or other benefit upon purchase—can improve order conversion.
• Market Your Products on Facebook: Now, more than ever, e-commerce sellers are leveraging Facebook's power to promote their products.
These items were links, but they are long promo looking links, so if you're interested, you're probably better off searching for info, but I'd be glad to forward the email if anyone's interested in those links.
Also, I wrote a 5-star review of the cards, hope it helps.
Bushels -N- Pecks