Surveys are just a small piece of the puzzle. The best part about the surveys is that the qualification questions are typically short, there to confirm you're not breezing through it, and you can still earn points if you don't qualify. You will not answer 30 questions and then get denied, with zero to show for it. As of May 2017, they've paid out $191.5 million. They give out 7,000 free gift cards every single day.
Paid survey site companies invest billions of dollars into marketing research online. They always want to find out more intricate details of a consumer's relationship with their product. Whether it's a new television show or just an existing product line, companies like Disney, Samsung, and Sony go to great lengths to find out their ideal audiences.