We’re heading to a world where there are just a handful of influential bookstores (Amazon, Apple, Nook…) and one by one, the principles of open access are disappearing. Apple, apparently, won’t carry an ebook that contains a link to buy a hardcover book from Amazon.
This is the Google dilemma as well - how to you have an open search engine for the web that simultaneously promotes your own brand? You can’t. Period.
Same goes for Apple, Amazon, B&N - a choice must be made: Be objective or don’t, but don’t pretend to be one and then actually be the other.
Side note: Publishers have given these companies the keys to the castle. Just amazing how helpless the actual content creators make themselves.