If they made it public, they could never do it again.
You don't see foreign governments identifying individual NSA employees when the NSA hacks into something...
I suspect that it does happen, but most people don't know about it because that requires knowing another language, and then regularly keeping up with the media of another country in that language.
I'm guessing part of the reason they're willing to ID them is because the DOJ knows this will never actually get to court where they'd have to explain how they found them.
Seems likely. I wouldn't be suprised if it was done as a way to get them put on watchlists in all western countries without having to officially reveal any sources or methods.
If they made it public, they could never do it again.
You don't see foreign governments identifying individual NSA employees when the NSA hacks into something...
I suspect that it does happen, but most people don't know about it because that requires knowing another language, and then regularly keeping up with the media of another country in that language.