No idea why this is going on, or how long it’ll last, but it would seem as though some of the Online Passes for EA published titles have suddenly been reduced to the super-low price of free.
The price reductions were caught and detailed on NeoGAF and, for the time being, are only on Xbox Live. Online Passes for games like Mass Effect 2, Dragon Age, Bulletstorm and Kingdoms of Amalur: Reckoning are available, but it should once again be noted that there is no way of knowing how long these will stay free. At the very least, if you own any of the listed games, but not their Online Passes, maybe pick these up while you can.
{Source: NeoGAF}