[mothered]

It's a variant of that other method where you cancel the delivery after it's been dispatched then call them saying you never meant to cancel, get them to ship again, receive 2 items

This Is targeted at Amazon, and not yourself.

After you've contacted them saying you cancelled It by mistake, why would they ship another Item? They're obviously well aware that It's In transit, so the cancellation will be reversed and the order will once again be marked active.

Doubt it ever worked tho

You're not wrong there.