you get 500 tokens to join (I get 100 to refer you) and a $10 card is about 12,000 tokens. They add up fast... take surveys, click on e-mails they send, lots of tokens to be had! Been doing this maybe 3 weeks or so and have close to 5,000 tokens. You also can earn points by shopping through them, similar to mypoints.
Anyways, if you are interested in being a freerider, then please consider allowing me to refer you. Thank you.