A 70% royalty at the Apple App store or for an author with an ebook for the Kindle at Amazon is a revolutionary business model. There will some time needed for adoption of these pricing models as well as reactions to them, i.e. publishers wanting to push amazon's maximum price for their ebooks past $9.99, to allow the publishers to make and take a cut of this revenue.
Users direct features in this software, results in a big hit
