I look at the miiverse activity for games I am interested in, especially e-shop games.
The first months - half year - of miiverse in 2013 there was a counter showing how many posts every community had. That was a nice feature, but Nintendo probably felt it was damaging to games with little activity (or games with troll-activity).
For the people that are not nerds like us, it is a good place to get information.

It seems to me that the Karaoke community have a lot of fun, and many of us here probably are not even aware that this game exists. ( I realize now that this a game US did not even got yet - EU have not Meme Run or The Letter)

It's a slow night. I guess because it's 4am, it's Christmas, and I'm at work so I'll post again.

If Miiverse is such a powerhouse when it comes to sales why doesn't it extend its power to other games? I mean, maybe The Letter did well because it was like $2 or something and not because of woord of mouth. Almost all Miiverse posts speak positively about games. Software sales should be huge across the board!

It is not very hard to find post that are critcal. And you mostly can have direct response from the developers.

Here are some examples of comments I found searching a few minutes. Most of the comments are game related or only for the joy of communicating.

Plenty of Fishies Community   https://miiverse.nintendo.net/titles/14866558073501394876/14866558073501394883     "Another mode that's dull when playing alone."   "i think this would be so much better if u guys can fix the frame rate !"

TOSS N GO Community   https://miiverse.nintendo.net/titles/14866558073506721079/14866558073506721088    "meh...at least it was cheap. not bad, just boring."

Shiny The Firefly Community   https://miiverse.nintendo.net/titles/14866558073488892477/14866558073488892491   "gotta ask what on earth is with all the hate this game is getting. it's actually a decent game. especially for the price. i think this games getting more flack than watch dogs."

Heptrix Community   https://miiverse.nintendo.net/titles/14866558073488880979/14866558073488880989    "I don't understand how one could have the talent and ambition to program a game but completely botch the controls like this! Clockwise rotation only and an all or nothing drop??? "