I need to develop a website where companies would login to post their surveys for market research (paying for surveys) and individuals would login to take paid surveys. Companies would fill out brief introduction and select users by gender, age, income, family status, location, ownership etc, then create survey by typing in questions and answer options and lastly would pay. If they pay offline, admin would approve when money arrives.
Survey takers would fill form about above mentioned details and provide e-mail and wait. When company chooses people by above aspects and choose number of people they want to involve, for examle 1000, all elligible people would be notified and first 1000 granted access. After completing survey they will have a web money or bonus and when it reaches certain amount they will be paid by paypal or (bank transfer and checks-offline).
It is ok if free survey applications , that are easy to use and that analyzes results. like lime survey is integrated.