I am a member of SurveySavvy.com If you join, you can get paid when you participate in surveys. When you refer friends, you will get paid for their participation and their friends' participation. They pay cash! I get a check or 2 a month, I make about $90 a month from them.
CLICK HERE TO JOIN FOR FREE AND START MAKING $$$ and click on 'Join'.
This is totally free to join and they pay pretty quick. It was a nice to have a check come every few weeks.