Interesting response to parse. My personal take, please forgive stream of consciousness brain dump.
Very successful for costco doesn't necessarily mean very successful for Alterra, a pass is access to a limited shared resource not the same as a manufactured product like cookies where you can make more
I don't think costco can offer a sku that will sell out so quickly as it did last year; as it would be unfair if not all members could have access to purchase, so probably are negotiating for a higher quota; but Alterra cant dilute or take too big of a loss vs their own sales either, esp. considering they are a unique product, not substitutable, and this is year two, so the word is already out, eceryone who skied at an ikon resort this year knows about it, no need to cannibalize sales for visibility.
Will be interesting to see how it plays out, I predict no costco deal, or at best no significant discount vs buy now, maybe a free chicken at best.