Walled gardens are ok for iPad, but Amazon tries it, and we're up in arms? Lets be morally consistent here. If Amazon 'owns the platform', they can charge anything they like. Arguments about the quality of the offering, security of the store etc are irrelevant to the core issue: does the seller of a device have the right to dictate terms about use of the device?

I'm not a fan of walled gardens. But if they are allowed to exist in our free market, than this ebook pricing change is not novel.