1500% is possible but look at 999.00 lots, 0seconds Trade with 0.2 pips profit!!
That's not an ethical way of trading.. this is CHEATING the DEMO FEED!
In my opinion whatever contest should reward a good action plan and a day to day trading technique.. that's trading!
I was in a contest by c*shba*kforex and there were rules like disqualification for account with 50% (open pl) drawdown and in case of trades shorter than a minimun duration about a few minutes.
This is for sure an incentive to fair players in a fair contest!