If I could, I'd rephrase my question of what makes him stand out from all the other thousands of people who have sold companies for ~10m net? From an outside perspective it looks like the biggest success of his career pre-open AI was getting PaulG to like him a lot.
Hence why I'm asking if others can vouch for him being brilliant or something.
sold companies for ~10m net
We don't know the exact numbers for this particular case, but you can be sure people lost money. Raising $30m doesn't mean the company was valued at $30m; it means the company was valued at much more. For example if you took $30m in a typical Series A round you'd be valued at $150m. If you then sold for a third of that...