He was essentially fired from the employ of the CIA only to find another position at NSA. Apparently the CIA got wise to his attempts and shut him off. The NSA wasn't so lucky.
None of this detracts from the disclosures of NSA overreach. But we would be foolish to discount the possibility that all of this is a huge smokescreen for a concerted and consistent attempt to weaken or expose US intelligence operations. The fact that an impingement of our sources and methods helps our adversaries cannot be understated.