I guess it depends on how frequently Sony exchanges its databases with its creditors and subscribers. Remember how "MIRC" works, the databases are updated every so often, weekly even, some servers much more frequently. At such a time, it is only possible to perform hacks, to allow certain unrestricted accesses. The same is true for Sony, perhaps Microsoft also ... sometimes you may get luck and get some extra money. If so, then its best to spend it and add the game to your console, its unlikely Sony would contact you, over a database error that resulted in you obtaining a free game. I'm sure this occurance of doubling of said monies happens frequently enough, hasn't happened to me, but for the people that it did happen to, wanted to know more about; "under what circumstances", and "how old was the PSN card with the monies and perhaps how much". Simply to increase my changes of getting double the monies.