And dont forget the gold and the copper etc. They have if I remember ca 20-30 oz gold in every shipment-not enough to make recovery cost efficient- but almost as much gold as a junior gold miner-pcf- produced in an entire quarter a couple quarters ago!
They also collect the larger pods of copper to store in 25 ton containers though they are not mining for copper.
They also have aluminum as bingo has detailed in his posts-something they may eventually sell also.