Swagbucks is a paid to click site that you can earn cash(paypal) or other vouchers(Amazon, etc)
Sometimes when you are searching the web through the Swagbucks site you get awarded with points. It usually happens a few times a day.
Every few months Swagbucks bring out a range of collectors bills, once you collect the whole set you are awarded a bonus.
Here are some of my luckiest searches.