Last I checked, and this was 6 months ago, there isn't really a comparable ad service to AdSense in terms of quality. Nothing else I've seen manages to serve s

Last I checked, and this was 6 months ago, there isn't really a comparable ad service to AdSense in terms of quality. Nothing else I've seen manages to serve such targeted, high quality ads. That said, you can make good money from other approaches like affiliate marketing, products, and so on.