>To avoid commingling, sellers have long had the option to apply a unique, seller-specific Amazon barcode — known as an FNSKU (Fulfillment Network Stock Keeping Unit) — to every product. This ensures their inventory is tracked and shipped separately.
... is that really all that was necessary all along? I can see that being a problem for, like, 10 cents worth of stuff, but a lot of the commingling complaints have been around expensive items. It's not zero cost of course, but for your average $30+ thing it doesn't seem very difficult to justify.
https://www.geekwire.com/2025/after-years-of-backlash-amazon...