I’ve been using TopCashBack (TCB) quite a bit as a portal for booking accommodation (including some eco-lodges!) on Booking.com, Hotels.com, Expedia and sometimes Orbitz.  The hotel rates are the same so you might as well get something back.  I’ve seen cash back as high as 20% but usually it’s around 5-10%!  There is a promotion on until 10 Feb where you get a whopping $20.16 per referral once your referrred friend spends at least $10 using TCB’s portal.  If you are already a member of TCB, you will see this in the “Refer a friend” link at the top and you are already qualified for this offer.  If you are not a member of TCB it’s a great time to join!  If you use my link, I will get the referral bonus and be very grateful!