The creator has an estimated net worth of $50 million to $200 million prior to Open AI hiring him. If you listen to any interviews with him, doesn't really seem like the type of person who's driven by money and I get the impression that no matter what OpenAI is paying him, his life will remain pretty much unchanged (from a financial perspective at least).

He also still talks very fondly about Claude Code and openly admits it's better at a lot of things, but he thinks Codex fits his development workflow better.

I really, really don't think there's a conspiracy around the Codex thing like you're implying. I know plenty of devs who don't work for OpenAI who prefer Codex ever since 5.2 was released and if you read up a little on Peter Steinberger he really doesn't seem like the type of person who would be saying things like that if he didn't believe them. Don't get me wrong, I'm not fan boy-ing him. He seems like a really quirky dude and I disagree with a ton of his opinions, but I just really don't get the impression that he's driven by money, especially now that he already had more than he could spend in a lifetime.