What possible reason is there not to open the source for these apps?
There could be so many contributions and innovations from people who want to help with the code.
There could be so many contributions and innovations from people who want to help with the code.
If you're not in a position to run a community, it makes sense to avoid doing things that suggest otherwise. People will ask questions and be upset when you don't have time to answer, they'll submit pull requests that you don't have time to properly review, etc.
I believe it's really a lost opportunity and I've asked them about it but received no response.
They don't own the right to distribute all the source for the apps? (I mean, it's possible.)