Veteran author Jim C Hines offered some of his titles independently direct through Amazon's Kindle store. He discovered that Amazon reserves the right to arbitrarily reprice his books -- slashing the cover price of a $2.99 title to $0.99 -- and pay royalties on the lower price.
Hines points out that when his traditional publisher and its bookseller partners decide to offer his work at sale prices, he still gets paid royalties based on the cover price, and discusses the difficulties he faces in lacking the clout of an agent or a major publisher in negotiating with Amazon over this practice.
With my DAW books, if a bookstore offers a sale, I still get my royalties based on the cover price. Amazon is selling Libriomancer for pre-order at almost half-off, but I'll get paid my full amount for every copy sold. Not so with self-published titles. Looking at my reports for last week, my royalties were slashed by 2/3 for every copy sold, because Amazon paid me 70% of the $.99 sale price, not my list price.
According to the KDP Pricing Page, royalties should be based on the list price ($2.99) unless the price adjustment was due to a price-matching situation (dropping the price to match a competitor's price) … but my royalties report still shows a 67% cut.
When I followed up with the DTP team, they responded thusly:
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http://boingboing.net/2012/02/26/author-discovers-that-amazon-c.html















Imagine buying a car that locks you into one brand of fuel. A new BMW, for example, that only runs on BMW gas. There are plenty of BMW gas stations around, even a few in your neighborhood, so convenience isn't an issue. But if one of those other gas stations offers a discount, a membership program, or some other attractive marketing campaign, you can't participate. You're locked in with the BMW gas stations.