The diggnation guys are now also sponsored by Barterbee.com. It is some kind of rag-fair online for Movies, Music or Games. You can put stuff in that you want to get rid of. But instead of trading items for real money you get points which you can use to shop new items on Barterbee. The revenue for Barterbee comes from the handling of the transaction: each deal costs a $1 fee the buyer has to pay to barterbee.com.
While trading “points for goods” seems not to be a very exciting concept, barterbee.com in fact offers its own currency that can only be uses on the barterbee.com site. Users can buy points for $1.
But what if you gained 1000 points and you don’t want to buy anything at Barterbee anymore? Can you “trade” your points for money? Probably not. I am not sure if people think that through before signing up such a system.