Thank you. I've received some of those too, a small package of pencils for example shipped from China, and I agree those are probably that scam. The key is that the product is of incredibly low value.
This doesn't match though the higher value items, costing dozens to low hundreds of dollars, which I've inexplicably received, and which seem to be related to random things I've done recently that are unique. Those shipments I feel reasonably are bizarre and unusual and otherwise reasonable explanations of scams just don't explain them.
It's something that is hopefully going to fall into decline now that shipping rates are becoming more balanced.