He made his money selling SSL certificates in large quantities, I don't really think he is a Bill Gates or Steve Jobs.
He reminds me more of the type of entrepreneur who makes his money then decides to buy an English Football club and run it into the ground.
That's possibly unkind though, there was enough good work going into Ubuntu providing good support and sorting out allot of the common Linux Desktop issues to award him some credit, but I don't really see Ubuntu as any kind of creative juggernaut.