Comment by akoboldfrying

1. A for-profit company rationally doesn't want competitors launching products using their code. Why would a non-profit care at all?

2. An app like Signal depends completely on network effects, so there's even less motivation for a community-fragmenting fork than in most OSS cases, where you'll notice that forks are already rare. There would have to be something very weird or contentious happening with the original codebase for people to want to fork it -- otherwise it's in no one's interests.