From the horse's mouth: User revenue will be split 70% to the developer and 30% to Amazon net of delivery fees of $0.15 / MB. -- http://kdk.amazon.com/ http://

From the horse's mouth: User revenue will be split 70% to the developer and 30% to Amazon net of delivery fees of $0.15 / MB. -- http://kdk.amazon.com/ http://kdk.amazon.com/ That page also indicates the bandwidth threshold under which Amazon pays is 100kb/user/month.