So despite what everyone says, he is trying to pay back.
Trying and massively failing.
PBMining, 4284 TH/s should payout 52.2 BTC per day.
The last payout reported from address 1Payu22kpAENfgDjazV4GUwVvQgEorDK4c was .76 BTC.
They're continuing to pay out about 1%.