i have noticed something off regarding SatoshiDice. on june 25th, it appears they made some modifications to the system, and it appears that if i add up all of the bets that i have sent to the following address:
1dice7fUkz5h4z2wPc1wLMPWgB5mDwKDx
that the payout odds coming back, were on average 1:7.91 instead of the approximately 1:4 that is advertised on the front of the website.
How many bets have you made to that address since June 25th, and how many won?
SatoshiDice is provably honest - they use a publicly known mathematical function to decide whether you won or not, using secret numbers decided before the game started. A hash of the secret numbers was also published before the game started, so they can't change it.
Looking at the blockchain since June 25th (I started counting at block 186101), I can see that they have processed 3808 bets to that address. 1 was refunded for being over the max bet, 3 haven't yet been paid out either way, and of the remaining 3804, 885 won. That's 23.26% of them that won (1:4.298). We would expect 24.41% to win in the long run (1:4.096), so that's pretty close. It's certainly nowhere near the 1:7.91 that you saw.
