Strangely this is not advertised by either kaligo or amex.
When you go to pay for the hotel with an Amex issued card that earns MR points (card that have direct earn to QF or VA wont work) the kaligo website will pop up a message advising you will earn amex MR points instead of the usual airline miles.
Sometimes a particular hotel will be more expensive than the extra points justify, but I've made 3 bookings now where the cost has been the same, lower, and $20 more.
May not be for all Oz bargainers, but if you're trying to boost ya MR points balance so you turn left upon entering the plane, this might be for you. I've gotten about 10K of bonus points for really no extra $$$$
Beware Kaligo wesbite always more expensive.
At the moment, Ratestogo has 20% off sunseek20 , venere has 12% off PREF12Q42015