Now sources say Eos is scrambling to line up a fourth round of financing, perhaps from one or more investors in Dubai. (Current backers include U.S. venture outfits Golden Gate Capital, Sutter Hill Venture and Maveron.) Lebron confirmed the ad-agency split but declined to discuss turnover or financing issues.

FORBES: No Rest For A Weary Start-Up

That will make investors uncomfortable, given BolsWessanen's patchy record, and the news in January that a joint venture was underway with Golden Poultry International in Bangkok.

ECONOMIST: BolsWessanen

He urges aspiring golden-age entrepreneurs not to put more of their own money into a venture than they can afford to lose.

WSJ: Starting a Business Later in Life

Midas List members Peter Thiel and Yuri Milner are two other venture capitalists who can attribute the majority of their wealth to a certain golden touch with Facebook.

FORBES: The 10-Figure Touch: The Billionaires Of The 2013 Midas List