I'm an angel investor in Ad.ly, so I'm not 100% aware of everything going on there, but I at least thought I'd chime in. First, Ad.ly wants to make sure the ad

I'm an angel investor in Ad.ly, so I'm not 100% aware of everything going on there, but I at least thought I'd chime in. First, Ad.ly wants to make sure the ads stay high-quality. That's why they have pretty strict rules that everything must be marked as an ad, nothing is written in the first person, everything must be approved by publishers, etc. It makes it harder--as Gabriel saw. They're working on ways to make publisher approval better (there is an email that is sent to handle approvals; I'll ask the ad.ly guys if there's an unusual error rate). Second, I know they're working on lots of tools to make it easier to choose appropriate publishers. Everyone wants to use different metrics for how they choose, so it's a tricky problem, but the feedback is useful. Pricing is based on several measures of influence, and they tend to correlate well with CTR from what I understand. As Gabriel noted, the CPC is usually significantly better than almost any other high-quality ad network. So, it's cost-effective on a click basis. I hope with the tools to get volume as well, they'll make it easy to get volume.