Lol, OP complete clueless.
Would you pay top Dollar and buy a gold/silver mine which is mined empty? Would you make large investments and buy machinery when you could only get leftovers out?
OP must be a benefit recipient and firmly believes to get everything for nothing.
no need to be rude, was just a question. i understand what you are hinting at. although this is the internet there is no need to be a complete A hole
PS thanks for explaining