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.

yes lucky for those who play freebitcoin since the beginning they always believe that bitcoin has value and they keep collecting bitcoin thousands of satoshi every hour since several years ago, until finally we find 8 satoshi now, maybe one day it will be 1 satoshi because of the value of bitcoin price that goes up
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.