Ann: Up to 10.85% Copper plus Gold intersected at Horse Well, page-60

It makes a massive difference, it makes nearly everything more expensive, you have to sink shafts and declines into the orebody the deeper it is the more of everything you need and the more capital it takes to get there before you get a return ... and these are the least of the problems.

several years ago i would probably think the same thing as you and not really understand how to read and interpret results until i really started to understand more and more about mining and what a quality orebody looks like, i suggest you get on twitter and learn from the mintwit people if you really want to learn/understand why this sold of on the poor result and WHY its a poor result.