Everyone should make sure they get a tetanus booster prior to opening an AMT package.
I wonder if that piece of rusty iron weighs as much as a PSU. (I have a theory; it is stupid, but reality seems to be much "stupidier" than anything I could imagine...)
I had a theory as well. but some extra metal in the box so you don't notice the missing PSU when picking up and not rejecting the miner outright.