Sure, it is for general stores, but this is more of a coherent brand/art thing. Intuitively limiting supply below demand is also bad for sales, but many companies make it work because it’s part of the „experience“ and hype. It being an experience vs. just a store is probably the motivation here.
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Also good UX doesn't mean standard run of the mill UI. It just means people know how to get joy/value from whatever you put in front of them.