Swagbucks search and win?

Today my wife found a site that you can supposedly search and win prizes. It's called Swagbucks. There are actually some good prizes on the site but I am not sure yet how many points you can get every day. One of the tips is to search as you would normally search.

So far we've only gotten 8 swagbucks (including the 3 that registering gives you) and a $5 amazon gift certificate is 45. If you want to sign up, click the banner and you can sign up using my wife as the referrer. I guess we get a swagbuck for everyone who signs up.