"Thiel owns Vance" is obviously shorthand, but is there evidence that Vance is actually under Thiel's control or do they just agree on stuff? I think proving corruption would probably require that Thiel personally/materially benefit from actions that Vance takes in office, not just that he funded Vance's campaign because he agrees with Vance's politics.

Edit: I think there's a much stronger case for some kind of corruption charge against Trump, since he's been using the office to enrich himself.[1]

[1] https://en.wikipedia.org/wiki/$Trump