Yeah well, I was just looking at it from the point of view of the long term average. Of course you will end up paying the tax sometimes, even if you don't have a winning system.
The point is, the tax is not applied in the way it is on Baccarat, for example. In Bacc, you only get a 95% return on banker bets: every banker bet. That has a grinding effect on your bankroll especially when you make large bets. That doesn't happen here because the deduction is made only on net winnings at the end of a session. Big difference.
You know, if NZ has the same odds as coin toss, then there will be times when the losing sessions will be even with the winning sessions. So in the long run the player will lose those 10 percent to the house per winning session. It´s still unfair payout in disguise.
