Because Australia is looking into it, New Zealand is now following by trying to get GST (15% here) added to online digital services. Parcels are too hard at the moment.
If it was just about adding GST it might be ok, but as soon as tax is added on then 3 more taxes are added pushing a $60 GST bill to $120 - and then there is the 5 day wait for the "next business day" letter advising you how to pay your bill.