About 64 % of ebook customers buy ebooks as well as print books, while 36 % buy only ebooks. (indiesgogerman.com)
Their DRM scheme doesn't even work so all they are doing is making a bunch of money for doing nothing but creating a huge hassle for ebook customers. (blog.the-ebook-reader.com)
Yet, there are 5 cuts being applied which reduce how many books and ebooks customers buy from you and which reduce how much you make per book / ebook. (dealsagar.com)