Woot! I'd attribute them to the "12/30" fighting games 1-day sale" until we know later tonight when the Xbox.com page goes live.
Adding to the OP now ... Done! Not too worried about format for now, since we'll know within a few hours if it's a 1-day deal, or misc. promotion.
I don't always buy
points, but when I do, I click this CrazyGameTime
affiliate link below
Cornelius's gamercard, so CGT will forward 2% of the proceeds so he can buy more points!