I got this in an email and checked it out. I tried a couple of mock bookings in US cities and found discounts of 7% - 9%, not the full 10%, but better than a kick in the face.
T&C's: Discount is only available from booking engine on this page. Should you navigate away from this page please ensure you return here to make your booking otherwise you will not receive the discount. Please note that selected vehicles at certain locations may not benefit from the discount. 7 seat vehicle do not benefit from the discount - If you are unsure as to whether your rental benefits from the discount please contact us at [email protected] prior to making your booking as we cannot retrospectively apply the discount. Exact discount may fluctuate marginally up or down depending on car / location selected - prices shown include discount. ends 16/05/2013
ugh. I find www.priceline.com to be far better than this site. Assuming you aren't hiring from the airport (which is almost always more expensive), priceline will search multiple car places in a town or within an X mile radius.