You really got 100K reward points only from the HI-LO game? that is some heavy betting... 0.5BTC so I don't really understand why you needed to exchange the reward points in order to withdraw funds, if the withdraw threshold is 30k satoshi...
The most likely scenario is that he had more than 1 account under the same referal link, and that he used it to try to steal from the system. If he really did bet 0.5BTC, the referer got 0.002BTC+Reward points+Lottery tickets+participation in the contests.... Only from 1 account!
But let's wait on the Quinn to confirm that