I've done well at stock market speculation over the past 12 years. It took me 20 years of doing it to become good at it. If I'd had LW available when I started I expect I could have become good in around 5 years.

One of the difficulties was that with most strategies, 1-year returns are sufficiently dominated by luck that the feedback is nearly useless.

The contest might be valuable if it lasted close to 5 years and wasn't a winner-take-all event. Would that attract any participants?