It seems like an idea with some potential. They charge the ads' publishers based only on clicks or impressions of saved ads. Saving and storing ads is free on both the users end (obviously) and the publishers end, which means ad publishers should be able to get started on the system without much risk.

I'd think the value to publishers would be in acquiring additional metrics about user interest in a particular ad, but I'm sure the pricing will be a critical piece of the puzzle.

They certainly have a number of well-known advisors and large investors (not that that is enough to predict success!), it'll be interesting to see if it takes off.

Direct link to the site: http://www.adkeeper.com/