Video games are not the only entertainment form where the owner of the platform owners tries to get exclusive content to attract more users... either by buying exclusivity or by making the content themselves.
It happens in music: http://www.thewire.com/technology/2014/03/get-ready-more-itunes-exclusive-albums/359031/
It happens in video-straming platforms: http://en.wikipedia.org/wiki/List_of_original_programs_distributed_by_Netflix
Most devices support Netflix (okay, some put it behind a paywall), but many competitors exclude many devices... Amazon Instant Prime has no Android app, iTunes only works on Apple devices and Windows, Video Unlimited only on Sony devices and Windows, Watchever hasn't reached every device either. The content of these video platforms differs very much. Every show/movie that is only available on one of these platforms is a timed exclusive until further agreements have been made.
It happened in retail movies until Betamax or HD DVD were officially declared dead.
It happens in broadcasting... every TV channel has its exclusives, and if it's only a stupid game show.
It happens in eBooks: http://www.amazon.com/Kindle-Exclusives-eBooks/b?ie=UTF8&node=1268190011
It happened in the news business for over hundred years. Breaking News! Exclusive Story! Only in the XY Times!
