GeekComplex
Neo Member
It's not that she's rare. Fans like her. Wario and Waluigi where popular upon their release (Wario even managed to get his own spin off title right after Mario Land 2: Sacred Coins).
Rosalina just happens to be an amiibo everyone wants. If anything, I don't think they're pushing her enough.
Honestly, for me It's this and the idea that she's sort of two amiibo in one. Why Peach or Toad don't get a Power Star as a tag-along is beyond me...