It definitely is open source insofar as it being a public repository that accepts contributions. However, the disclaimer at the top of the repo does seem to sug

It definitely is open source insofar as it being a public repository that accepts contributions. However, the disclaimer at the top of the repo does seem to suggest that free offerings might be scooped up and put to other uses... I can see where the degree of "open sourceness" might be questioned in a case like this. I will re-iterate that I am willing to accept that there might be other politics at play here.