As a general rule when criminal conspiracies are taken to task, they don't retain a right to privacy for their communications that aren't about the criminal conspiracy. Rather it all comes out in court. I understand why Snowden released the way he did, and given how it kept attention on the subject for longer than Binney/Klein it was probably the right call. But there should have also been an escrow/intent to dump the whole trove raw after some time period.