NZ has expensive (and not particularly fast) internet, which is probably why. On the other hand, setting up a limited-liability company took me an hour (including registering for GST) and cost $40 when I did it (it's a little more now), and costs nothing to renew. And the time zone difference means we're often working when the US is sleeping, which can be handy when you're deploying a new version of a production site for a US audience.