Sure you're not thinking about someone else? Snowden gave his files to journalists, not WikiLeaks.
The premise that "there is no anonymous" escapes 4 out of 5 people I talk to. It takes very careful explaining, to bring people to the understanding that their are hacking teams with names, that get away with things, and the things that those named sub-groups manage pull off are perpetrated by "some unknown, anonymous group of people" until evidence demonstrates who done it.
Because of this, The Proles (people who aren't paying close attention) often confuse the premise being a simple anonymous tipster with being affiliated with the fictious premise of an organized, regimented imaginary hacking group that possesses a rightful claim to the mantle of "Anonymous" as if it were Batman.
Then media outlets exploit this cluelessness, to sell advertising, by drumming up exciting click-bait that perpetuates the false narrative that there is a movement called Anonymous, rather than the prank call it really is.
From where I stand, he released Power Point slides to journalists, outlining the broad strokes of some programs and projects.
He did so in a way that proved there were deep flaws to be found in the manner in which the NSA secured itself. Had he not proven these flaws by demonstration, those flaws would likely have persisted until, instead of merely having its pants pulled down in the middle of the street, the NSA might have been stabbed to death for its wallet.
Why listen to me though? This very document even says they still live with the hazard of another Snowden coming along and pulling another Snowden. It is, in fact, the conclusion of the document we are discussing right now.
He didn't have to release all the documents in the manner he did. He could have leaked them to Krebs on Security or something else. Krebs is very trustworthy at protecting sources and data itself. Instead he just dumped it all to the world with disregard for the damage it would cause and the innocent lives it would impact.
There's a difference between drinking coolaid and realizing there's drugs in the coolaid so you blow up the entire party coolaid is served at damn the consequences to the innocent waiters and waitresses tending the party.