I don't know how it works in the rest of the world...

But in America we pay reward people for good deeds.

In some cases, human-rights groups charge, detainees were wrongly apprehended because locals turned them in for the money.

Well if our military picked them up, their would not be much left. Just look at saddam's sons.  The guy who turned them in also got to keep all the money because it was Dead or alive.
 
The article has some good reason why to keep Guantanamo locked down, though they only way we can know if those reasons are true if is they open up Guantanamo to the world.  I personally think that Guantanamo has done lots of good, and because of the veil, we may never know that.
 
cube