$4k = 4%... Should be higher than that shouldn't it? You only have to ship a minimum of 7 items in a month to move up to 6%.
I think Amazon definitely deserve more credit, the possible 8.5% is a really good rate for specific products. Many brands tend to offer up to 12%, but some stores like Toys R Us offer just 3%.
During the World Cup I wanted to push those Jabulani footballs, but the sport stores were only selling the Glider versions. Adidas sold them all (but ran no affiliate program) and the one other place was Amazon.com. At Amazon you could find the Jabulani Final ball, the Jabulani match ball, all of the Gliders and even the MLS versions. Because Amazon have become so popular now a lot of manufacturers tend to go straight to them first as well, so you can pick up plenty of buzz products there before anywhere else.
Very nice!