They’re all scams.

I responded to one of those cable TV late-night spots for BIGSPOT.COM and within moments my disposable e-mail account was added to dozens, if not hundreds of spam lists. I never found my way through all those screens to find a real survey that paid money.

Consider the perspective of companies: why would they pay you to take surveys? What knowledge, information, or experience do you possess that brings them value? Probably very little. Most survey sites pay a few pennies per survey and you must earn at least $75 before they pay you anything

If there were a lot of free money out there, everybody would be doing this and eventually, a new survey website would go to the companies saying the can get responses for less money. Competition and market forces will quickly drive down the payment for people answering surveys.

There is NO free money to be found. Anyone telling you otherwise has a vested interest in convincing you otherwise.

Notice how nobody ever provides details, but just a link to another website. Can anyone give complete details about the surveys paying $6.00? Such as, what types of questions were asked, how many questions, and how long it took to answer the survey. What percentage of surveys are worth $6.00? All these sites look like e-mail harvesting sites rather than offering significant earnings (paying minimum wage or better to ALL participants).
References :

There are some legit companies out there. What you’re going to want to do is find directories that actually help you. Try a site like findmysurveys that list them all out for you.

You’re not going to make thousands. Instead, refer others and you can make some decent money =]
References :

You could try Global Test Market or Opinion Outpost, those are 2 really good places and have earned me the most money, plus they are free to join.
References :