I found some more...
Australia Big4 Holiday Parks Loyalty members AWD # P223200 - discounted rates
Australia Citibank cardholders AWD # P188000 - discounted rates; free upgrade for Gold and Platinum cards
My Best Buy members AWD #S654600 - discounted up to 25%; 50 bonus points
uPromise AWD # K563500 - receive 5% of rental cost as contribution to college fund