Correct me if I'm wrong, but QF has gouged Aussies and Kiwis for decades, with membership fees. Thus it is necessary for such people to have international expat addresses, or pay the fee (if there is not a free option).

Nowadays, QF is making theirs free as part of a link to a supermarket 'everyday rewards' scheme. Now that the FFP is essentially a business in itself, selling miles to corporate programs like the rewards scheme I mention.