It seems that this is a model built for the publisher. How does it work for the advertiser? Do I need to set up a daily budget? Is it still a CPC model? Or do I 'rent' the ad space for a day? Google's Display Advertising places my banners and text ads at relevant site based on its algorithm. How do you compare?

From the publisher's perspective, where are the ads coming from? Are they submitted to your own internal directory or pulled from some where else? My initial concerns would be the quality of advertising on my site. How can I be certain that the ads will match my content? AdSense already 'knows' my site content and provides accurate/targeted ads relevant to my visitors. How do you compare?

Please shed some light for everyone. It is an interesting concept - I'm just skeptical about its comparison to AdSense.

(Sorry to be blunt, but I'm playing devil's advocate for everyone).