OpenAI never enforced this, removed it, and admitted it was a big mistake. I work at OpenAI and I'm disappointed it happened but am glad they fixed it. It's no longer hanging over anyone's head, so it's probably inaccurate to suggest that Calvin's post is positive because he's trying to protect his equity from being taken. (though of course you could argue that everyone is biased to be positive about companies they own equity in, generally)