Did the terms and condition say only for Victorian residents?
Entry is free and open to Australian residents who:
(a) are a Qantas Frequent Flyer member;
(b) are 18 years of age or older;
(c) are residents of Victoria; and
(d) enter into the Promotion:
email harvesting no doubt, quote from terms "By entering your details you agree that we and our affiliates can use this information to market products and services to you"