Another excellent rewarding site is FreeRide. They offer gift certificates, not miles. If you go there daily & click on destination points 7 times for at least 6 points per banner ad, you can eaily get a $5 Reb Lobster/ Olive Garden gift certificate in 2 weeks. The offer a variety of places to spend your FreeRide points, but the only travel-related gift certificate one can earn is from Marriott.
If you're feeling generous, when enrolling please enter my username under the question of Username of friend who told you about us: FMETZ
FreeRide:
http://www.freeride.com