[allenu]

Honestly, this confused me. The number immediately made me think he was submitting fake orders for that amount. I don't know to read it any other way.

[oh_sigh]

My guess is that there is every possible combination of items that is added to the cart, and then the API response returns what items are unavailable/out of stock.

Honestly, I'm not in love with this post for HN. It seems like something done and communicated for twitter clout and is devoid of interesting details.