I hope Anthropic is giving him an equity grant worth $1B or more in their upcoming IPO. Having him will increase their market cap more than that, if for no other reason than that people trust him as a judge of who is winning the AI race. Worth it even if he never does any work.
Personal update: I've joined Anthropic. I think the next few years at the frontier of LLMs will be especially formative. I am very excited to join the team here and get back to R&D. I remain deeply passionate about education and plan to resume my work on it in time.