Bjarni here, lead dev. Happy to answer any questions.
Why AGPL rather than a more liberal license like BSD or MIT? Edit: Just to clarify why I'm asking this, the project looks very interesting and I suppose the choice of AGPL wasn't made lightly, as it might slow down adoption by commercial organizations, so I'm interested in the reasoning behind this choice.
But in the current startup world several aynrandian douchebags would take it and make web services or paid apps. Put a lot of money on viral marketing. Pester them with feature requests. And never, ever contribute back to the community or acknowledge it helped their business.
I know a famous BSD developer who switched to *GPL because of this. Also, search for tptacek's explanation. It's counter-intuitive but this is the best license at the moment, mostly for reasons Stallman didn't forsee.