No she didn't. Please stop repeating this claim.

She signed up for an email subscription from her personal gmail, on her work computer.

That would certainly have been enough to raise her superiors' hackles when discovered, but the result would have been her getting fired, not indicted.

The bottom line is having a personal subscription to the Intercept was not ever going to be enough to build a case against her. You repeating that claim is victim blaming, and more importantly, wrong.

Exactaly right. You should assume, especially in an environment like the NSA, that your internet browsing and email correspondence is being monitored and certain hosts and suspicious DNS will trigger something.

I've worked at far less security concerned companies that monitored all network traffic going and out and logged it and continually were looking not only for internal nefarious behavior but for possibly viruses, worms, etc.