The sale draws interest to the area.  In a sales pitch there always needs to be validation of an expectation.  Such as going to a car dealer and telling him you are going to buy a RED CAR(?) He answers back well we just sold 75 RED Corvettes, a  300Red Ford pickup trucks, and 2500 Red cargo vans to a shipping company, we think that we have exactly the Vehicle that you need and it will be RED, expectation met, buyer signs the deal. Hint COPPER is called the "RED METAL" and if the Car dealers are all selling RED CARs in your neighborhood then setting up a new dealership in the same neighborhood just might be a great idea as everybody is buying RED vehicles,(copper).  So if you dont BUY today they may all be just sold out! And you will have to walk HOME!  BO HOO!