With Open Source/Free Software as well as Creative Commons we have build pipelines to contribute to the commons (great!) but we never thought about how to defend those commons against appropriation.

That is why Open Source ends up massively benefitting corporations who don't give much back. That is also why Creative Commons has no interest in building more modular licenses that do for example prohibit training "AI" systems.

It's the market-based, liberal idea that if there's a lot of stuff there someone will make some money, someone will fund a startup and that is what everything is about. We've been had.