In my opinion, Apple has gone too far. It is one thing to offer an in-app subscription as an option with the 30% terms. It is quite another thing to force anyone selling subs outside of the app to also offer them inside of the app and at the same price. If publishers raise prices to give Apple its cut, it will then raise prices on everyone, some who are not even using an iOS device. I think that this is the most arrogant, outrageous thing Apple has ever done. I love my iOS devices and I love the products Apple has developed, but forcing this is just plain wrong and totally greedy.
Apple, get a clue before the big guys get together and pull their apps. Apple, you will lose hardware sales. Apple certainly will lose my loyalty if I lose Kindle, Netflix and Zinio on the iPad.