As long as you are willing to do your homework you will be able to find many legitimate companies that are willing to pay you for taking surveys. You should be prepared to register with many companies so that you always have a good amount of surveys to take.
As a first step you should join a membership site as this will assure that you have access to a substantial number of companies that will pay you for taking surveys. The important thing to note about these membership sites is that all of the major companies will have their surveys connected to membership sites. This is true because the major players recognize these membership sites as a viable source of serious people who are interested in taking surveys for pay.
Companies use the information that is included in the surveys to make important decisions about their products and services. Because competition in the marketplace is so intense, most companies use the information they learn from consumer surveys to understand how consumers feel about their products and services.