TL;DR: The big tech AI company LLMs have gobbled up all of our data, but the damage they have done to open source and free culture communities are particularly insidious. By taking advantage of those who share freely, they destroy the bargain that made free software spread like wildfire.
As i understand, Linux is under a license (GPL) which explicitly prevents closing the reuse of its code. So it’s all about legal interpretation of “reuse” and so far the GPL stands up against abuses. I suppose that a company specifically targeting the source code for the intend of creating another OS might need to hire more lawyers than developers with far from certain results. But who knows, in a world where billions $ are free as soon as “AI” is mentioned in a business plan.