I did it for several months and felt like it was more trouble than it was worth. All I got were coupons and some products (to review) that I wasn't all that interested in. What I didn't like was that the products to review had to be reviewed and sent back w/i a short time period like 10 days or I would be charged for them. Really not worth it. Just doing survey's, I felt like my personal info was also being stored and I was just getting a lot of spam emails and paper mail.
No doubt there are more lucrative situations. I just couldn't find them