I figured i would post this just in case anyone thought about clicking on the OP's link.
It operates on several levels, principally exploiting those who wish "free" stuff for little or no effort.
In theory, you are signing up with them, getting 250 points at once - which at a penny a point is worth $2.50, but only where they say you can shop. However, just signing up doesn't really get you that 250 points, you must sign up for and complete your first "offer".
While they say that many of these are free, such as taking a survey or clicking on links (and you know how often those are scams), they acknowledge that some of them require you to buy something.
In other words, while they loudly claim that you don't need to give them your credit card info, the first place you are likely to be sent will want your credit card info, and will charge you for some product you are unlikely to need.
It gets worse. If you try and be clever, and only do the "free" surveys and such, you will find that you can be ejected from the program at their sole discretion for "fraud". Their terms of service - which they count on you not reading - makes clear that "fraud" is anything they think it is, and you lose all points and referals at that point.
It gets still worse. To the extent you managed to gain any noteworthy amount of points - and good luck on that - they have all kinds of disclaimers about shipping the product. It "can" take up to ten days or two weeks. It isn't always "free". And that they have a whole section on what to do when you don't get your order tells me all I need to know about how often that happens! (The instructions are elaborate, and seem designed to let you stay waiting patiently forever.)
It gets still worse. It's a MLM - Multi-Level Marketing - scam, in which you are to "earn" points by signing up all your family and friends. You will get up to one whole dollar for doing so - but the small print shows that your friend has to actually buy something or take endless surveys first. Thereafter, you get 15% of whatever pennies he/she manages to earn.
Bear in mind, that no points are earned except that you either buy a product, or spend your personal time. Any casual perusal will show that you are either going to spend $20 to get a penny, or spend an hour getting that penny. I mean "point", they don't automatically count as real pennies!
Their claim that a member "can" make over $1,000 sounds thrilling. But they don't say how long that would take! Complaints that people are booted when they actually start - against all odds - accumulating real amounts of points abound.
The opposite answer that follows - minus the link I removed from it after it was posted - is quite instructive.
Source:
http://wiki.answers.com/Q/Does_points2shop_work