Yeah right, if only this surge in price could have happened few days ago then I would have won the bet, LOL.
Also, the base rewards for free roll on freebitco.in has now decreased by 1 satoshi due to the surge in bitcoin price.
Current base reward is 8 satoshis.

I am not completely sure what you write is true, because I think that base reward depends on personal stats, if you use it a lot, without wagering, betting or playing multiply game, it will decrease. You may take a look at "% achieved...." to see how it changes when you roll or bet.
It's true:
Play MULTIPLY BTC, BET ON EVENTS or buy lottery tickets to increase your FREE BTC rewards by up to +0.00000171 BTC
So by wagering, you can increase the base reward, but even if you don't do any wagering you can claim the base reward every hour. We had a little discussion a few pages back:
https://bitcointalk.org/index.php?topic=320959.msg61675848#msg61675848. As you can see as the price of Bitcoin is higher the base reward is lower, and vice versa.
The question is will it rise enough to affect WoF spin prizes? I have 996 free spins waiting, I am not sure if should I spin them while the prizes are max 50... I planned to wait for the next Lambo draw.