Originally Posted by Gigs

OK I just tried out this system. I paid 500 L$ and got 500 Z$. I played a few hands of blackjack on a fairly well written machine, betting 100 Z$ per hand. I got my balance up to 600 Z$ and decided to quit while I was ahead.

I went to the cash out game, it's a matching game like concentration.
You pay 1 L$ to play, and you get a free Z$ for trying. You have 2 minutes to complete a 4x4 game of concentration. You'd have to be really really slow or bad at it to lose. If you lose the match game, you don't lose and Z$. So you can play as many times as you need to until you cash out successfully. There is nothing at-risk in the game of skill.