I think the assumptions aren't that far off. Nintendo takes a minimalist approach, it's their business model. It was revealed not long ago that they're finally upgrading their online servers after who knows how many years. Following that, Nintendo is more likely to offer less than risk printing too many. The inclusion of scalpers, who have proven to sell or have sold the Sanrio packs upwards of one-hundred dollars only makes obtaining said cards more difficult. If you don't make a concerted effort to get the cards on release day, you're probably not getting them through traditional means.