Ok, so this isn't a scam (i've searched). You sign up and earn "swagbucks" for searching and then you can use those for gift cerftificates or prizes. You use Google anyway, right? This is powered by Google so you get the same results.
Click on the banner to sign on, and I get bucks for you signing on then you get a friend to sign up with your name you get bucks...yada yada. you get the idea.
You never pay anything or give any financial information--this isn't a pyramid scheme! Give it a shot, I mean, who doesn't Google every day? Might as well get something in return!