Bet you a dollar the GitHub mobile app that's going to come out pretty soon will also be totally proprietary with no source provided. It's a growing trend in developer tooling: even Docker's desktop versions (not Microsoft's fault, but still) are not even open source (much less free software).
It's going to be really sad in a few years when Microsoft starts turning the screws to extract more revenue from this free software ecosystem (GitHub/npm) that they are coming to exert major control over.
Soon, the most common "industry standard" tooling for the largest and most popular software development ecosystem (javascript) will rely heavily on proprietary software that spies on you continuously while you use it, just like Windows.