PlayNoEvil has all the links of what looks to be a really, really massive dupe:
The expanse of this so far is probably lost on most people so I would like to make a few facts clear. In the past 4 jears we are talking about ISK in value of 2.500.000.000.000 ISK to 3.000.000.000.000 ISK. That’s 2500 – 3000 billion. Everyone that owns a T2 item can bet that it was build in part from resources due to this phenomenon. At this point I would like to thank CCP for making it possible to buy GTC’s with ISK.