If it's iron or aluminium, someone probably will pay silly (Earth) money for it on the Moon during early colonisation, but maybe not right at the start when there's no bandwidth it facilities for recycling scrap. Right up until the bigger regolith smelters come online.
The box of pre-loved Beanie Babies, perhaps also quite valuable: who knows how much hydrocarbons will be worth in early lunar colonies. Carbon isn't especially abundant in regolith (compared to silicon, aluminium, iron, etc) and has to be baked out as gases. Though I still doubt you'd have takers if the shipping isn't included...
Yes indeed. Apparently some of the carbon will come along with hydrogen as methane when you bake it out of the rock. Separating straight to carbon and hydrogen is a hassle, though, as the carbon clogs the catalyst.
Perhaps crashing a carbonaceous asteroid into the moon or disassembling in orbit and landing the results may work?
The amount of tools needed to process that junk and make newly usable stuff would be huge and not worth it. Not even talking about the energy needed to take the junk there and land it safely. The article is talking about rocket bodies mostly: they don't have that much useful material.