I wonder about these surveys too, usually the rewards aren't too great and sometime involve chance (contests, raffles, etc.). Check out "cha-cha". My buddy did it last year. Its basically a free answer site for people who text questions and you don't make much $ at first, but can over time. you start at like 5 cents a question or soemthing, but it can add up I guess and you get rate increases with time.