I know the odds were changed a while ago but now it appears the reward amount is also reduced. The base reward should be 41 sats based on the price of BTC but it is 40 sats instead.
What exchange are you using for the BTCUSD price?
I’m going by the same exchange rate used for the faucet. If I remember correctly, the base WOF prize was 2 cents worth of BTC rounded down to the nearest sat. Now it’s 2 cents in BTC rounded down and then another sat is subtracted. The difference is negligible but I still found this change kind of odd.