It's really a shame because I would pay good money to have GitLab EE under a FOSS license.
Of course it's a free software license (although I have my doubts about the enforceability of the Affero sections in the AGPL). GitLab EE is proprietary (even though you can read the source).
It's GPLv2 incompatible. GPLv3 has a special exception for the AGPL.
You may like GitHub or not, but you cannot deny they contribute a lot to Open Source. I am not entirely sure how much that has changed since his resignation, but here is Tom Preston-Werner's position on Open Source: http://tom.preston-werner.com/2011/11/22/open-source-everyth...
That seems like a bizarre complaint, considering git itself is FOSS, initially written by Linus, and that GitHub's entire business is effectively built around hosting git repositories.