American Express Australia have an offer (registration required) that when you charge AU$200 or more in one or more transactions online at HotelClub.com by 14 June 2015, you will receive one AU$40 statement credit. Register by following this link. You can register each of your American Express cards separately.
American Express cards issued by any of Australia’s big four banks and American Express Australia are eligible for the statement credit, with the exception of corporate cards and David Jones branded cards.
This can be stacked with the hotelclub.com 15% discount promotion code fast15
bonus15 for participating hotels booked through 11:59PM on 10 3 May 2015 (US Central Time) for stays before 31 December 2015.
In addition, you can get cashback by opening hotelclub.com through the Cash Rewards website.
These promotions might make it worth your while to direct your next hotel reservation through hotelclub.com. It’s worth noting that most frequent hotel guest schemes don’t allow you to earn points, and some don’t honour elite benefits, on stays booked through third parties (this is because they have to pay a steep commission).