Ok, have fixed the link.

Mmm Serious Hat on now - please be careful when stating what is or is not a hobby business, a business that maybe below the threshold for having to deal with GST is not necessarily a hobby business when it comes to income tax, please do not get these areas confused. The test for a hobby is a lot more complicated, so hobby is not really the correct term to be using for just being under the $50,000.

I have a legitimate business that turns over less than $50,000, that could never be classified as a hobby as far as income tax is concerned. With it I choose to be registered for GST as it makes it easy to deal with other businesses.