NYT hasn't actually won that case yet, so it's pointless to bring up. OpenAI has publicly stated that NYT heavily has misrepresented their findings.

OpenAI's value would plummet and crash if they gained a reputation for using illegal material to train their AI on, investors would drop them so fast.

This is just a simple fact. LLM providers reputation is heavily staked on the legality of their data.

So far the courts have ruled in these companies favor.

But it's extremely likely illegaly scraped Dara from reddit would not pass the sniff test and debestate an offending companies reputation.

If you don't understand why, you have to do some brushing up on why these LLM services are worth so much and who is using them and for what. Once you understand that, it becomes extremely apparent why legally owning the entire history of every reddit post ever would be extremely valuable, and why a 5bil price tag is actually not that crazy.