That will probably happen to some extent if not already. However I think people will just stop publishing online if malicious corps like OpenAI are just going to harvest works for their own gain. People publish for personal gain, not to enrich the public or enrich private entities.

However, I get my personal gain regardless of whether or not the text is also ingested into ChatGPT.

In fact, since I use ChatGPT a lot, I get more gain if it is.