He could crowdfund it by selling yearly subscriptions. I'd easily pay $60 a year for a investigative-minded digital magazine with Greenwald as Editor-in-Chief.
Readers pay a single $5 a month fee, but get access to everything on platform (Over 40 professional journalists). Example of an article http://www.beaconreader.com/eric-randolph/what-one-refugee-s...
Beacon is a weak word, and Beacon Reader flows really poorly. It doesn't convey impactful journalism. It'd be proper for the #3 newspaper in Sioux Falls (if there were such a thing).
My two cents for what they're worth.
I would expect the organization to uncover wrongdoing irrespective of political affiliation or national origin. I'd expect it to push extremely hard for transparency, forcing transparency where possible. Any news organization that leaves no rocks unturned where people can hide their weaseling is awesome in my book.
Basically, I'd pay very good money for an investigative news org with journalistic might equivalent to the military might of US Armed Forces.
People in politics, finance and all sorts of equivalently powerful organizations need to feel as naked and vulnerable from and information security perspective as we do after learning about myriad NSA surveillance programs.