I get on my 3DS after a long hiatus to play a few games and download the Bravely Default demo, and see that I have to make a mandatory "Nintendo Network ID" to download any demos or free content. Where did this come from and why is it being implemented? The sign-up process didn't explain any details on why Nintendo is implementing this system.
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IIRC, in a recent update, Nintendo integrated the 3DS into the Wii U's online service.