Mysterious
Banned
Why wouldn't they? It's a price hike do to a weak dollar. It's happening to games and systems, why wouldn't it happen to amiibos also?
Retails already paid Nintendo for whatever is sitting on shelves now. Price hike would apply to future orders being placed. Gold Mario was probably placed sometime back in January or so, when the dollar was worse than the summer (Waves 1, 2 and 3).