Being able to make money doing surveys is not some invention of some internet guys as a scam to take your money as most people would think.
The concept of being able to make money doing surveys has been around much longer than the internet and companies have been paying very good money for this type of consumer feedback for many decades.
The reason this type of work exists is because marketing companies years ago convinced major brands that being able to get feedback directly from potential consumers is the very best way to market products or make improvements to existing products. This makes perfect sense as if I am trying to sell something I certainly would like to know what the average consumer thinks of my product.
By getting paid to take surveys online these companies can cut their cost of being able to offer this type of work and get a larger sampling of the population at the same time because more people are apt to try making money this way if they can do it online.
The trick to being able to make money taking surveys online is avoiding the hundreds of scams that will have you taking fake surveys or even worse, have you taking real surveys but never providing compensation for the work performed.
The best recommendation for doing this type of work is to get signed up with a directory company that acts like a recruiter for marketing companies offering this work. These directory sites will weed out the scam companies and ensure you are only involved with honest companies that are paying the very best compensation for your time.