Most of these companies and probably all of them contribute to Open Source for sure, but they don't contribute back to the projects they use. Instagram being a

Most of these companies and probably all of them contribute to Open Source for sure, but they don't contribute back to the projects they use. Instagram being a golden sponsor of Django (https://github.com/Alir3z4/oss-wall-of-shame/pull/3 https://github.com/Alir3z4/oss-wall-of-shame/pull/3) but still it's not officially claimed that it started to sponsoring yet. A 3 years old fork of Django doesn't seems to be a real contribution. Have a look at instagram and its size and tell me a 3 years old fork of their web framework of choice, something that made them $$$ is something to be called a contribution. Contribution is not only code, it can be $$$, hosting, hiring a developer to work on the project or many many other ways.