If you decide to try this route, make sure you have the time and determination for learning how to earn money through online surveys.
If you spend only a short period of time on online surveys for a couple of weeks, then you will probably make a couple of dollars a week. Many high-end surveys may take up to 2 hours at a stretch. Generally the amount paid depends on the time you spent on the survey. This means the more time you take to finish the survey the more you get. Many companies even pay as much as 250 dollars for a 2-hour survey.
Google can take to many websites that have information on online surveys paying money for your comments. Skim through the page and find a couple of websites that interest you. You can be sure that there will not be any scam possibilities with government surveys.
Sign up with the sites you have selected and give your e-mail ID to them. Check the sites periodically, so that you will not miss any requests. Then fill out the surveys to the best of your knowledge. As you get more proficient, you will find you can fill up surveys of more companies. Sign up with more companies, you get more survey and can earn more. Set aside a dedicated email account just for surveys. Go in for an email account with spam filters and junk mail options.
Shun such websites which say you won some product, as always there is a condition by which you have to buy some product. Don't fall into such traps.