Without him they wouldn't have had the cash to do much.
If I recall for those two, he hired people who knew what to do, forked over enough cash to make it happen under them, and pretty much let them do their jobs while he didn't directly interfere much. Mostly PR.
Which is what a person should do if they are needing expertise outside their bailiwick. Get an expert.
Twitter, he's got his hands all up in that bitch.