Some of the biggest open source projects are owned by megacorps, like React (Facebook), TypeScript (Microsoft), and Tensorflow (Google). And it's clear from these examples that their stewardship has wrought benefits for both the company and the community. The company benefits from what would otherwise be their internal tooling becoming an industry standard - Facebook doesn't need to train React devs after hiring them. And the code is more robust as more people use it - Microsoft doesn't even need to use its latest TypeScript version, they can just wait for the community to test it for them...