If you travel in 2020, this might be an option as Mastercard deal is not applicable after Dec 31 2019.
10% OFF deal https://www.ozbargain.com.au/node/460613 also requires in 2019.
Note: Cashback on Hotel Bookings for 2 Nights or More: 8.00 %
If only one night, it is still 5%, then shopback 6.5% is better
So far, I only found Energizer/Booking.com deal and Agoda AMEX deal don't have year 2019 limitation.
Tried hard agoda 10% off https://www.ozbargain.com.au/node/460969 but didn't work it out