Booking.com Referral Program
Booking.com is a travel fare aggregator website and travel metasearch engine for lodging reservations. Big savings on hotels in 120000 destinations worldwide. Browse hotel reviews and find the guaranteed best price on hotels for all budgets.
It’s not every day you find a referral program that gives you money back (not credit back to your account, but to your credit card)). On top of that, both people involved get something. In addition to this referral program, they also runa referral program for those who host a rental property (and the incentive is even bigger).