Soundwave on 15 February 2014
Miiverse likely doesn't have enough of an audience to warrant any significant ad revenue.
iPhone/Android apps have a potential audience of hundreds of millions of people.
Wii U has a userbase of 5 million users, probably only 1/3 of whom check Miiverse with any regularity (I boot right into whatever game I plan to play).
Candy Crush Saga has been downloaded something like 500 million times.
