From an affiliate manager’s point of view I have seen some pretty large players come in from NZ.
Down Under we have a pretty big “pokie” culture.. I’m pretty sure that goes for NZ too..
If you’re going to target NZ players you should definitely do some research and make sure you get the lingo down pat because that could be the difference between a converted player and someone who leaves your site because they are not confident that you know your stuff…
BTW, we call slot machines “pokies”…
Cheers 
Renee