Vendors like Samsung and HP also have much lower expectations of additional future purchases from them once a user buys the device. If you buy an eBook reader

Vendors like Samsung and HP also have much lower expectations of additional future purchases from them once a user buys the device. If you buy an eBook reader you need to obtain a steady stream on content for it as long as you want to keep using it, while other retailers have a far higher chance of not getting that $10 back because they don't have a well establish content store like Amazon or iTunes.