They should & deserve to have full control over everything they've created.
You can blame AWS/GCP for letting GitHub & npm be acquired, how many years were they on the open market?
Most of the $$$ in OSS is being funneled towards rent-seeking major cloud providers that are hosting OSS software, whom should all have blank checks with the money they've reaped so far, but seems only Microsoft has the strategic savvy to focus on acquiring the obvious targets for increasing dev mindshare. I don't fault them for their M&A's, it's just good business.
It's also not like Amazon is being an amazing open source citizen; I don't see them acquiring the tech to be an automatically-better outcome than the current version of Microsoft doing so.
IMO this shows the importance of separating technology from platform. Ideally we would have non-profit groups with good governance & corporate support (rather than control) to grow these technologies. If an open source project can be acquired, it's only so free.
