If you're looking for a low risk and fun way to make some money. It's free to join and use, and there's really no "catch" to the whole deal. So long as you don't mind waiting a little while to collect your earnings, there's no reason not to sign up. Especially if you already enjoy using social networking websites, since you're probably already doing exactly the same things that thousands of happy Yuwie members are now getting paid for.
Come see what its all about at http://what-is-yuwie.blogspot.com/