My view is that this is an "investor" challenge, and I for one treat it like that. As the dude in charge of the investment club I'm trying to simulate what I would've done if I were to invest R400k worth of our money.
OP does have a valid point though, sure his club member would be ecstatic over that return, but less of they lost 80% odd on the day.
I know I will never win this competition as one of the guys with all their money in a single equity is bound to get it right, I use this as a measure against myself and the ALSI to see my performance.
Just to quickly derail here....
Why not clone this competition and make a trading simulation! I not sure how much work that would entail, but I'm pretty sure you going to create huge traffic and maybe really earn some moola here for all the hard work you have put in.