I would say that there are many legit paying survey sites. But I am yet to find one that pays good for the time and effort that you put in there. Surveys are considered as one of the most popular ways to earn online. But then they are not the best paying one. Survey sites come with the following issues
1. They favour tier 1 countries. Many of these are global ones but they favour certain geographic locations. There are more surveys and better rates for tier 1 countries. Other countries are not favoured much.
2 . Disqualification..Even after getting a survey invitation, you are not assured of completing it and getting paid for it. You might get disqualified mid way. And that's frustrating. Because you are not paid for the time and effort that you have put in before being disqualified.
3. Low pay rates.
4. They can be monotonous.
So, my suggestion would be to invest in other ways like forum sites, writing articles, freelancing etc to earn online. You can fill in with some survey sites to make some easy money. Explore and see which ones work best for your geographical locations. Stick to only a few good ones as you would not want to waste a lot of time on surveys for very little earnings.