Even if the profits exist, "Who will be profiting" is a good question. Here are some points (1) Afghanistan's chunk of revenue from reserves will almost all come from Loyalties. They don't have engineers to design mines, no capital equipment to sell, no skilled labour, etc. At best, there will be a slight trickle of money to those serving food and cleaning at camps. (2) Loyalty revenue, in a country as corrupt as Afghanistan, is not going to go the people - at best a small slice might be used to build some infrastructure (3) All this foreign investment in the Country will lead to huge inflation which will make housing/food/etc even less affordable to the average afghani.

Source: I've lived-in and worked on mining projects in the developing world and saw all this stuff happen first hand.