Profit? It's a 501(c).
[1] https://www.irs.gov/charities-non-profits/publications-for-e...
EDIT: A somewhat more detailed view of the structure, based on OpenAI’s own description, is at https://news.ycombinator.com/item?id=38312577
Since this news managed to crush HN's servers it's definitely a topic of significant interest.