"Amazon’s algorithm. [Insert scary music]
Heretofore, the list price of a book had no bearing on popularity and rank. Now it does. Some bright authors at Kindle Boards figured it all out. There’s a podcast here, and articles here and here to break it down for you.
The gist of it is this: if you price at $.99, you must sell more copies to be ranked comparably to those selling at higher prices."
Read the full post: About that Algorithm | Indie Jane.