I know little (not a lot) about hashes and hex strings, so maybe someone could please explain exactly where the number 429496.7295 comes from and why this brings the probability to 1 in 20,000.
Seeing how nobody here ever heard of a 10,000 roll, it is often suspected that the real probability is much lower, more like in the billions.
I can't tell you about the chances of win the jackpot, I don't understand about programming, but many people here heared about a winner once. There is a print here somewhere in Micro Earnings section and some people talking about it.
But it's true that for the number of FreeBitco.in users (thousands), the number of times the jackpot appeared is too low. Maybe the faucet users are too unlucky?