Well I will most certainly agree there is &quot;publicly accessible&quot; source, which is essentially what Microsoft, Facebook, and the likes have, where you can view the code, but getting a pull request accepted requires signing a CLA (with varying levels of avarice) and conforming to the goals of the organization, rather than the project. (Actually I will defend facebook by saying their CLA is not that egregious, and according to most, the version of react that is open sourced is actually different than the version they use internally), but calling that &quot;Open Source Software&quot; is disingenuous at best.