Here's what he does to scam you:

Site says your payout is based on the people who deposit after you.  He conveniently changed the rules so that's not true anymore and he could avoid paying out .3245 BTC.  He now makes it so the last deposit DOES NOT count towards anybodys payouts.  He kept that important fact secret or just made it up as soon as it was convenient for him to do so. 

Second thing he seems to do is his own sniping at the very end.  Despite telling people not to snipe, he seems to do it himself so he doesn't have to payout to anybody else but himself.  There's no way to track or prevent this so he's free to do it every time!

You might not have gotten screwed yet, but ultimately you will.  Best to stop now if you're ahead.  I'll keep up daily reminders so nobody else is scammed.