How it works
After this market closes, I will ask @FairlyRandom to generate a random number N among 1 to 5000 in the comments. The Nth unique trader of this market wins 2000 mana from the lottery prize pool, if such a trader exists. Otherwise, the lottery falls through till next time.
For free play, make a trade with 1 mana and sell it. Your trade will be recorded and you will become a unique trader. This market will resolve to 50%.
This seems like a hack that the mods will probably disallow somehow.
Also, it costs 1m to play. It's not free. You get back 0 when you sell.
@DannyqnOht I think that last part is a rounding error, but I agree with the first part. This seems like trader bonus farming. The @mods or AI unranks it, but to stop trader bonuses it would need to be unlisted as well.