HN: Is Zappos just Amazon inventory now?

I ordered some goods from Zappos website, and it came in an Amazon box. Has Zappos basically just vanished and now is just a front end to the same Amazon inventory, warehouses, and SKU mixing? So whatever random 3rd party seller goods are in Amazons inventory, that’s what ships out of Zappos? I think even after they were purchased they were running as a separate business for a while?