Xiao is 5 weeks behind on paying rakeback, and is once again locking his thread to keep people from complaining publicly.
It was only a question of time until this fraud scheme will fail!
When the traffic decreases with 70 signature promoters here on BitcoinTalk, then you can be rest assured what will happen sooner or later.
The collected but not paid 500 Bitcoins jackpot is probably spent now and they have cash flow issue.