None of those founders were actually successful with the other project. Steve Jobs bought then sold Pixar, and later sat on its board, owning a bunch of shares but not actually being involved operationally. Peter Thiel is not successful because of FF or CC, he's successful because of Facebook and Paypal (both at different times). With Elon Musk, you may have a case but I haven't read enough details to know.
The main point the gp is making:
Peter Thiel is known for: Paypal and after that Facebook
Elon Musk is known for: Paypal and after that Tesla
Steve Jobs : enough said.