What are ways to earn mileage plus miles in Australia?
There aren’t many. Flights on Star Alliance airlines, or hotel or car rental earn are probably your best bets (outside of buying them).
You can also earn Amex Membership Rewards points and transfer to United via Starwood Preferred Guest.
Or you can do surveys. Lots and lots of surveys. Each one will earn you 40-70 miles each time. I gave up at 430 miles…