They're not serious, of course. How do we know that? Two reasons:
1) If they were serious, they could write checks to the U.S. Treasury right now. No one is stopping them.
2) If you look at the website, you'll notice that they are soliciting funds to put their ad on television. These dudes are millionaires. What, they can't afford an ad buy?
Well, maybe if they get their wish, Obama can put their ad on PBS or something.