It's not a scam because they make money too
you get $25 for 6500 points, you start out with 50 plus you earn 100 more for downloading the search toolbar (of course you don't have to).
you can earn points by searching, commenting, rating
Here's how it works:
You get points for each time you search, vote, and comment. The points are distributed as so:
1 Point for searching
2 Points for voting
3 Points for Commenting
You can also get your friends to join and you earn 25% of the points each of your friends earn!
To prevent cheating, there are regular reviews on the comments members make and the max points earn per day is 500.
The primary goal of Scour
To gather data on the popular sites that people tend to visit the most through votes, searchs, and comments.
So JOIN! You can earn money while you search!! Its better than searching and earn no money at all! =]