Global Test Market is a company that you should definitely join. They are hands down, one of the best survey companies you will ever find on the internet, and they are willing to show you that they respect your time. GTM operates on a points system, where 1000 points = $50, which is rather high, but is still very easy to attain. The best thing about them is that you are promised to be reimbursed for every survey they send to you, and even if you do not qualify for a survey, they will still deposit 5 points into your account, which is 25 cents. They send a high amount of surveys per month, and I’ve received anywhere from 10 to 20. The surveys you will qualify for and complete generally pay anywhere from 50 cents to $5, although they do say they send out surveys paying up to $10. They do not have a referral system, but I would highly recommend you joining this site, and I promise it will be one that earns you the most money.