Other optimisations of Sony's are largely about
hooking you into Sony services: Sony Video Unlimited is a movie
store that lets you rent and buy digital movies; Music Unlimited is a Spotify - like streaming service; and Reader by Sony is an
ebook reader that also handily nudges you towards buying books from the Sony Reader
store.
Another way of boosting their
ebook monopoly, I suspect - get most of a country locked into a single platform (particularly a country like Australia, where Amazon doesn't have a specialised
store - front [2]-RRB- and you've got them pretty much
hooked for life.