There is a small amount of value here in that you and your friends can discuss good deals but you may not feel compelled to take up an offer until a friend that

There is a small amount of value here in that you and your friends can discuss good deals but you may not feel compelled to take up an offer until a friend that reckons it's a good deal actually does themselves. Apart from that there isn't a lot of value to the user. I've thought about various implementations of this to do with affiliate marketing, but I wouldn't go as far as to link accounts, the value there would more like the people that have brought this item also brought type thing we see today.