Why does this matter to you? As to your other questions, the talent is abundant. The privateers could have probably gone in and captured key operatives within Al Quaeda in short order and without loss of civilian lives.
Furthermore, they get their remuneration from the property they sieze.
The requirement for obtaining a letter of Marque (basically a license to steal) is a bond which insures that if they get the wrong target or commit crimes under color of authority, they will be held financially responsible if not criminally liable for acts that are committed outside the bounds of their authority.
It's far more efficient. The military has had 6 months. It doesn't take private militias that long to get ramped up and they can travel with more security and secrecy than any large military force.
And as to using Delta forces....the very idea behind the Delta force was counter-terrorism and yet I haven't seen even the slightest mention of Delta force involvement.
Um, what does Afganistan have to offer that would be worth the high risk involved?
So in addition to having to evade tens of thousands of heavily armed, well trained, battle seasoned terrorists, kill OBL, confiscate their WMD, topple the Taliban, tie up their finances, and gather intelligence about other AlQuaeda operations, the privateer is going to have to knock off a 7-11 too?
ROFL!
I have a picture of Indiana Jones in my mind. He's running through a crowded market place in a desert setting, where everyone is walking in pairs, carrying a large basket on their shoulders between each pair. Indiana is running frantically from basket to basket, knocking each to the ground, usually knocking over a basket of fruit or clothing. All the while Indiana is shouting, "Osama! Osama! Where are you??"
That's the way it's supposed to be. You wouldn't know.