Its what I do and it's worked out pretty well. What you have to do is complete surveys and offers for companies that want the public's opinion. No payment from you is ever required, not to sign up, not EVER.
The sites don't get paid directly from you, but when you complete an offer or survey, they also get paid a small portion of what you earned yourself. For example, if you complete a survey about computers let's say, you would earn maybe $2 and the web site itself would recieve $0.50 from the company also for getting you to complete the survey. These surveys take little time at all, most taking up less than even 1 or 2 minutes of your time.
They don’t need any information other than your name, email address and your home address. Yup, that is all. No credit card information, no banking information, nothing like that. All they require is your name and address so that your cheque can be sent to your home every month.
Personally I have been a member of these websites, along with thousands of other satisfied users, for approximately 1.5 years now and have earned well over $8600 by working in my spare time. This web site has been great to me, also the members and administrator are very friendly, and are always there to help you with a question or problem you may be having. I give you my word that they pay.