Of course. It's so easy to use a different book store, even with kindle, that this whole argument holds no water. Since Amazon doesn't really carry Polish book

Of course. It's so easy to use a different book store, even with kindle, that this whole argument holds no water. Since Amazon doesn't really carry Polish books, I get .mobis from random e-stores all the time. It takes no effort. There is no barrier to entry. Well, except actually having something in stock (easy enough when it's an infinitely copyable file) and making your website/UI not atrocious (not that easy, apparently). Most will even email it and Amazon will deliver it straight to the device. No need to look for the usb cable.