This sucks, I was hoping they'd eventually add it to Switch.
What I find really messed up is that this means you can no longer unlock everything in Mario vs. Donkey Kong: Tipping Stars. You needed to get stars from Miiverse to unlock everything, though Nintendo will continue selling the game. So anyone who buys the game after November 8 will not be able to get everything (unless they patch the game to let you get them other ways).