I've read over the program details several times on trademarks and such in regards to Amazon Operating Agreement. What I'm looking for is confirmation we can bid on branded terms that are not allowed in CJ/Linkshare/etc for products that are also sold though the Amazon.com affiliate program. From what I understand, there are some products you can't do direct linking with; however the products I want to sell do allow linking.
Read your terms of service agreement from Amazon. They haven't allowed PPC or any direct linking for a while now.