People paid $20? Mine was free from Club Nintendo.
I too think the switch version is overpriced, but Wii U's vanished quickly when they were hacked and it is a the best Nintendo system for that since it can run Wii U, Wii, and Gamecube games all through the HDMI.
If people want to enjoy this game now this is the cheapest route if they only own the switch. Also it looks like many people received a switch for Christmas because the software is really moving this week.