Publishers are going to loose control over this. Maybe they should embrace the digital model and not fail like the music industry.
"Let’s see if I have this straight, shall we? You are not going to pay me an advance for my book, so you are not going to guarantee me a minimum payment. In addition, you won’t be investing in a print run or physical distribution for my book, thereby significantly cutting your production costs. But, because you are (Insert Big 6 Publisher Name Here), I should be happy to accept the exact same royalty rate for my books as authors who are getting both of the benefits? Hmmmm, forgive me if I’m not impressed."
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