I received my new Qantas card in the mail (which incidentally allows you to load it up with foreign currency for when you travel) and saw this offer to earn 1 point per $1 spent on Airbnb through this Qantas portal plus 500 bonus points the first time you use it.
So if you have a card that earns points anyway, you can get double the normal number that you would get!
Bummer i wish i had this a few days ago, just booked an airbnb. Oh well at least i can use it for the last one.