On the 8th day of Christmas, my Sony gave to me: Double Station Cash. So you missed the triple Station Cash deal from the seventeenth and still want to get a good deal this month on fake money. Well you are in luck, because all day today* any purchase that you make either through Station.com or by redeeming a Station cash card (as seen above) will net you double the purchase value. Note that this does not include purchases made by mobile/SMS methods.
Double Station Cash is just another one of Sony’s daily deals in the twelve days of Christmas.
*Today means until midnight Pacific Standard Time
MMO Fallout 
Running a double station cash event three days after a triple station cash event does not seem like the best idea ever.
Granted, it could be worse. They could have run the double station cash event first. That would have made people angry.