A Procurement Manager's Guide to Negotiating With Amazon Web Services, 2014
www.gartner.com/doc/2873017/procurement-managers-guide-negotiating-amazon
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
AWS has a disciplined approach to negotiating enterprise agreements and discounts. We provide best practices for procuring these services.