CIA paid some Gitmo alums millions to turn on al Qaeda

Daily Mail:

The CIA turned some Guantanamo Bay prisoners into double agents then sent them home to help the U.S. kill terrorists in the early years after 9/11, officials have revealed.

The CIA promised the prisoners freedom, safety for their families and millions of dollars from the agency's secret accounts.

It was a risky gamble. Officials knew there was a chance that some prisoners might quickly spurn their deal and kill Americans.

For the CIA, that was an acceptable risk in a dangerous business. For the American public, which was never told, the program was one of the many secret trade-offs the government made on its behalf. At the same time the government used the risk of terrorism to justify imprisoning people indefinitely, it was releasing dangerous people from prison to work for the CIA.

The program was carried out in a secret facility built a few hundred yards from the administrative offices of the prison in Guantanamo Bay, Cuba. The eight small cottages were hidden behind a ridge covered in thick scrub and cactus.

The program and the handful of men who passed through these cottages had various official CIA code names.

But those who were aware of the cluster of cottages knew it best by its sobriquet: Penny Lane.
...

There is much more.

Some of these guys were paid in part with porn.  It opened a world of thousands of non virgins who always said yes.  It is not clear how successful the program was at locating other operatives.