Moneyjojo is an advocate of paid surveys and there are many reviews of various surveys throughout the website. The great thing about paid surveys are that they are free, you do not need any qualifications only to be the age that the service requires. If a survey site asks for payment upon sign up, it is most likely to be a scam and you should not proceed.
Various sites offer a certain amount of credit per survey completed while others offer cash per questionnaire. The rate paid depends on what the company offers to its members, whether they have different levels of membership based on surveys completed or for the amount of time spent answering the questions.