His involvement in the infamous WorldCoin provides useful insight into his character.
An oligarch and a degenerate (outside the US many oligarchs have a more or less sober understanding of who they are, although degeneracy among oligarchs is a global issue).
It seems that the ~$3.7 billion revenue figure is from this NYT article.
Some interesting background:
It will be interesting to see if their predictions turn out to be true. $44 a month seems steep for a LLM, not to mention there will likely be a lot of competition both from cloud LLM providers and local LLM initiatives.