Payment rates have been adjusted due to the rise in price of 1 Bitcoin. New rates will apply after your next payout.
Roger that, I would usually equate higher prices with higher trading revenues on Bit-X and more traffic but the price has risen fast enough that the rate change makes sense to me, the real question is if other campaigns will follow with lower payouts or if Bit-X will be the outlier for a few weeks, would ask for a rate lock to ensure stability but given the instability of prices at present that seems unfair as a suggestion.