I don't think the new $100B=AGI thing is about investment return, but rather about reassuring sugar-daddy Microsoft, and future investors. The old OpenAI-Micros

I don't think the new $100B=AGI thing is about investment return, but rather about reassuring sugar-daddy Microsoft, and future investors. The old OpenAI-Microsoft agreement apparently gave OpenAI the ludicrous ability to self-define themselves as having reached AGI arbitrarily, with "AGI reached" being the point beyond which Microsoft had no further rights to OpenAI IP. With skyrocketing training/development costs, and OpenAI still unprofitable, they are still totally dependent on Microsoft, and Microsoft rightfully want to protect their own interests as they continue to expand their AI datacenters. Future investors want the Microsoft relationship to be good since OpenAI are dependent on it.