Let's recapitulate briefly. According to the US Department of Defense, only 8% of the prisoners at Guantanamo were al-Qaeda fighters, and only 5% of them were captured by the Americans themselves.
The overwhelming majority of the others were handed over to the Americans by people who could reasonably be called bounty hunters.
http://news.bbc.co.uk/2/hi/middle_east/4708946.stm