Huh? When you click through to the ad there is a "Terms & Conditions" link in 10-point type at the bottom of screen. There are always T&C's attahced to any promotion.
For future reference though, I have yet to find a promotion or coupon or anything Avis-related that was applicable in the New York Tri-State Area. I'm sure FCTSTY will be by shortly to affirm this belief.