I've done Greenfield for over a year. I used to go to their webpage all the time and fill out every new survey, but I got sick of not being paid for them. I have won exactly 3. I have $15 in my account there and have probably done close to 70 surveys for them in that time. Some of them took me close to an hr. and I was sure I would win. They would have prizes of up to $500 for some of them. Well, now I only do surveys when I know I'm getting paid. There are too many companies that pay, and I'm sick of wasting my time with the ones that don't. If we all stick with the companies that pay, they will all have to pay sooner or later. I just delete all the ones that come to my email that won't pay me. Just my 2 cents!