It's a hack because public statements about how the contract was supposed to behave describe the expected behaviour. Anything outside the that was exploiting b

It's a hack because public statements about how the contract was supposed to behave describe the expected behaviour. Anything outside the that was exploiting bad implementations and therefore a hack. Some here might think the the code is a contract because that's the name. But that had never really been the case: public human statements supercede code.