That's the reason why I even started exploring the paid surveys world years back. I was so curious about getting something extra and if this so called paid surveys really work. It took a bit of getting used to and lots of practice surveys before I got the hang of it. It wasn't that hard nor that easy. It took much patience to understand the system and eventually started building up some points, rewards, credits or cash equivalent of any given survey.
Certainly not something that could make you rich but for someone who's trying to find some extra cash for the amount of time they have, why not? It's convenient and you can do it whenever you can. Just be mindful that once you start with a survey though, you'd have to finish it or else it will just expire session. The surveys will always be there for an opportunity but you will have to exert an equal effort to finish them. In time you wouldn't even notice the amount of time you put to finish one survey, once you start getting something out of it, then you'd find yourself wanting to do more.
I still use most of the survey sites listed on this blog, not as active as before due to lack time and I will keep doing surveys whenever I can because I really got good rewards and cash out of them. Right now I am on a venture trying to expand my work and side jobs, doing online articles, translation service, and my promoting my personal projects. Just like I said, every little helps.