online surveys have been around for generations. As of today only about 5% of this online surveys are completely free to join and legitimate. I know thats a terrible statistic but if you can find that 5% of legitimate online survey sites you will be in for a surprise.
Many of the legitimate online survey sites have special perks. One example is the site cashcrate. Cashcrate has a referral system that is unique to no other. They call their referral system a 20/10 referral. This means that the person you referr you make 20% of what ever they make. And if your refer gets a referral you make 10% of what ever their referral makes. The profits possible are totally up to you, you get to work at your own pace.