Greenfield Online is one of the largest Internet survey companies. They have TONs of surveys, and you earn sweepstakes entries or cash for taking surveys.

There are two ways you find out they have surveys: one is they emails you surveys, another is you can log-in to their website, and in the "survey center" list all the surveys that available to you.

I joined Greenfield panel around November 2004. At that time I have to say I was not happy with them - it seemed all the surveys are just for sweepstakes and I didn't get credit for the cash surveys I took! I was angry like lot of others and almost gave up on them.  However, starting March 2005, I noticed improvement of Greenfield, and they were getting better and better! Since then, I have not experienced any problems with Greenfield in terms getting paid.

Lot of their surveys are just for sweepstakes, but they do have cash surveys, and they have more opportunities for online focus groups/interactive surveys which pay more. For me, besides cash surveys, I also do online focus groups almost every month or every other month. My husband also joined Greenfield and he seems has more interactive survey opportunities than I do. I usually receive payment (check) within 2-3 months.

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