I’ve read a press release for a new Memphis, TN based self-publishing service with a unique ‘crowd-driven’ pricing model, and read through all of the information on their website. I have not, as yet, used this service. It sounds interesting, and it is a sales model that could be beneficial to both authors AND readers.
For authors, this may be something to look into. You initially put your book up on Screwpulp as a free book. As your books gains traction (‘as you promote your book’ and you get ‘good reviews’ is what the site says) the value of your book increases. The more popular the book becomes, the more money you’ll make.
For readers, you’ll have to give a review before you can download free books, and you can only download one free book at a time (you’re free, of course, to purchase as many books as you want at any time).