Filling out surveys is a great way to earn a few bucks, just don't expect to become rich doing so! Below you'll find the top 5 legitimate survey sites that are free to join.
Major corporations are consistently trying to find out what the consumer wants or opinions about their current product line. At times they'll want to try a new product that has not made it to production yet and get your feedback.
This is mainstream market research and smart business. And they are willing to reward you for doing so!