693
Amazon is making it impossible to remove the DRM from Kindle Books
(goodereader.com)
This is a most excellent place for technology news and articles.
100% they have pressured some smaller publishers and authors into exclusivity, especially self published authors that use their print on demand services. But most books you can find at competing digital storefronts.
I hear what you're saying, but I'd still like to see numbers before taking a stance.