Two of Elon Musk’s private ventures are set to be worth a lot more, joining his sole public company in securing massive valuations.

Elon Musk wants to gamify the act of cutting government spending — and experts in communications and marketing say it's a savvy strategy to get people to pay attention to a dry subject. The Tesla CEO said this week that he planned to post a public "leaderboard for the most insanely dumb spending of your tax dollars.