If every time he broke the fifty percent efficiency line, the value of the task would drop, didn't that bode fairly poorly? For one thing, although Di Tou had been able to reliably break through the average line, it still took him quite a bit more effort than a below-average level performance. More importantly, unless the jump to fifty was extremely large, there didn't seem to be a reason for the overall value of the task to drop. If anything, it would make more sense for the multiplier or whatever logic dictated the amount he gained based on his performance bracket to not jump as much.
Of course, to test this theory, Di Tou would have to wait until he was able to break past this barrier again to see what the amount gained was.
