You throw a counter-live, you get points. Points are money. Money buys happiness - or basic goods in Idol Hell. Does that not equate to an enjoyable time?

As for an actual number, that's difficult to calculate since the fortune itself can skew the probability of it occurring. Let's say you told me I would meet a stranger with green eyes that would alter the course of my future. Wouldn't I then be on the lookout for people with green eyes and therefore, the fortune becomes true because I'm fucking with the odds.