CPX Interactive

CPX Interactive bills itself as a "progressive online ad network and global marketing company". Offers "reach", "content" and "premium" network levels for publishers. CPM network.

From the website, for publishers:

Many publishers know CPX Interactive as the Internet’s most efficient monetizer of “long-tail” or non-guaranteed inventory. What they may not know is that CPX’s unparalleled reach and optimization allow us to monetize 100% of our publishers’ inventory - from the first ad impression to the last.

Most ad networks cherry pick their traffic, paying out high rates and sending the rest to non-paying "defaults.“ CPX, however, pays appropriate premium CPMs for those same “cherry-picked” impressions... plus we can also fill 100% of a publisher’s remaining traffic with CPM rates driven by real-time market competition, with no volume limits and no defaults.

From the website, for advertisers:

The CPX Interactive network enables both direct and brand advertisers the opportunity to secure cost effective online media in a global marketplace. CPX Interactive is dedicated to ensuring advertisers' success on any metric and optimizing online campaigns for all of our clients. We are proud to deliver more than 2.8 million campaign conversions every month, for clients ranging from niche direct marketers to major brands names. CPX will design powerful online campaigns around your specific goals, whether they focus on brand awareness, ROI around a specific metric...or a hybrid of the two.

Looks pretty professional, worth exploring.

Visit CPX Interactive