I love that this guy pulled this off. It's a great story.
I was reminded of the story of Mohan Srivastava[1], an MIT/Stanford-trained statistician, who found a flaw in the Ontario Lottery's "Tic-Tac-Toe" instant game. There's a great quote from Mr. Srivastava re: his morality and exploiting the flaw he found:
"People often assume that I must be some extremely moral person because I didn't take advantage of the lottery," he says. "I can assure you that that's not the case. I'd simply done the math and concluded that beating the game wasn't worth my time."