The loss became tradable on their exchange, the swap for equity was optional, their was also a token for for representing the return of the stolen funds that was trading as well. Eventually the tokens representing the losses were trading for an equal value to the loss so if you were a little patient you were reimbursed. Alternatively if you took the gamble to buy the debt tokens at below dollar parity you made a nice return. Meanwhile MtGox users are still waiting for legal proceedings to conclude and get their money back.