Earlier quoted context omitted.
Its license has strict limitations on what you can use it for. It’s not open source in any reasonable sense.
It is open source (the code is right there), but it's not Open Source due to what GP references. There is a distinction.
Re: Show HN: Kan.bn – An open-source alterative to Trello
#111I'm not sure the same argument that Facebook's marketing teams use, hold a lot of water on a really programming-heavy forum like this :)