You will earn MarketPoints -- the online currency at GlobalTestMarket.com.
MarketPoints can be used to purchase new and development-stage products that are being offered by Global test markets clients.
It appears that global test market have a lot of members because many times, unless you answer really quick to the survey, when you log to a survey you will be notified that it is already closed. I believe that the reason for that is the fact that you receive some kind of reward for almost every survey. Even if you are not eligible to participate in the survey you will receive some (thou not many) “market points”. Nonetheless, it takes time to reach a sufficient amount for a check.
Frequency of surveys: once in a couple of days
Average pay for survey: 3-150 market point (equal to 3 cents to 1.5 dollar)
Remarks: nice but slow way of making money online.