If you feel that you have something valuable to contribute to the community on the internet by all means do that survey because the information you put in might be so valuable to someone else searching for answers to certain questions.
If you have got any information which may be helpful to other businesses online and you can contribute or adding information to someone's ideas could land you very popular person and you may want to consider still doing these surveys' for a living.
There are many types of surveys that come online or in your email box. The ones that you want to take is the ones that you know the subject on and that would be beneficial to someone reading it.
There are many types of surveys like how many cups of coffee do you drink a day. This may sound pretty stupid at first but if you think about the company who is making the coffee they might want to know how many people around the world drink coffee or at least get a percentage of who drinks coffee.
That way they will be able to forecast future sales and adjust their advertising to get more sales, surveys tell a lot about a product. People who do these surveys get paid of the company to do them.
