I hope one of the people who get a link to the thread is the marketing person who put the offer together.
Why is Amazon considered part of the "search network"? It is obviously not a search engine.
At the risk of going off-topic for the thread, it is because your ads appear by virtue of a user doing a keyword search - whereas ads on Content partners are not placed on the basis of a keyword search.
For Content sites, ads are placed on the basis of an overview of all keywords in an Ad Group, taken together.