OpenAI owns the copyright over ChatGPT's outputs. They've simply stated (in a non-binding way) they won't exercise that privilege — although one wonders what would happen if someone created a Harry Potter-esque bestseller that includes ideas spawned in a ChatGPT suggestion.

Dumb companies are jumping on the bandwagon. Smart companies are avoiding it, for the obvious IP, confidentiality, and security issues.

As usual, try to work with smart people and avoid dumb people, who have a bad habit of dragging everyone down with them when they err.