Given that Amazon royally screws independent authors (not being a publisher, I can't speak to whether they screw larger publishers too) who want to price their works about $9.99 (if you're after a vertical market, Amazon hates you) I can only imagine they'll extend the screwing to authors who won't also make their works available via Unlimited.

(How do they screw us? They cap the 70% less download fee royalty at the $9.99 level. In order to make more than $7 (less download fee) per sale, you need to price a book at over $20. So if I sell a $20 book on Amazon, BN, and iBooks -- I get twice as much from BN and iBooks as I do from Amazon. To make the same royalty from Amazon, I need to charge $40, but Amazon won't let me do that. So I pulled my book from Amazon and revenues increased.)