You probably have seen the radio loyalty under or on other websites. Did you know that you can actually earn Visa Gift Cards and other items such as electronics using their website? It's actually easy to sign up with they offer a few different rewards. The best ones I've seen are the Visa Gift Cards and the electronics. You probably won't earn that much but if you enjoy listening to music, you could get paid for it.
Sign up for Radio Loyalty here.
Another site that you can get paid to listen to music on is 977music. Right now they are having maintenance and updating so their point system is currently down.