1, depending on luck and courage, this thing is the same as futures. It's not that you earn more if you collect more and sell more, but that you should buy low and buy high. The price of waste products changes every day.

It depends on what you receive. If you receive iron, you need a special certificate to receive iron. If you can do it, you can make a lot of money. As for how much you earn a year, it's hard to answer, because it's all business, and it depends on how you do it.