I'm trying to get a refund now. These are barely on the edge of ROI for me. It isn't worth burning the apartment building down for a few extra bucks. Will let you all know if I have any luck.
At the rate of difficulty increase, by December of 2014, a 70TH machine (if one will exist) would only have a shelf life of one month.
ASIC is really destroying mining. If code could be implemented to exclude ASIC it may need to be done in 2015 or sooner.