For the most part, having more money and more fame make your life harder. It just does. I've seen it happen with people. You know, it's so hard to stay normal. It's so hard to stay happy. It's hard to remember why you were doing what you did in the first place.
What did Citibank get out of it? It got the ability to reverse the arbitrage. Actually, what they got was the ability to give themselves a profit, and that saved the bank.