Yes, it's sad. On the other hand, I think it's a good thing that people share knowledge less, publicly and free of charge on the web, because there is so much exploitation going on. Big corporations obviously capitalize on the good will of people with their LLMs, but there are also others who take advantage of the ones who want to help. A lot of users seemingly expect others to solve their problems for free and don't even put any effort into asking their questions. It's a massive drain for energy and enthusiasm, some even suffer from burnout (I assume more in open-source projects than on SO but still). I rather want it to be harder to connect with people sharing the same passion "in private" than having outsider who don't contribute anything profit off of activities happening in the open. This frustratingly appears to become the main reason for corporate open source these days.