In a sign of continued trimming at Yahoo, the company has announced that it’s closing the Yahoo Publisher Network (YPN) — Yahoo’s counterpart to Google’s Adsense — as of April 30. YPN was launched about five years ago, but never formally advanced beyond the “beta” label. Yahoo is sending out an email today to members of the Publisher Network, and that email recommends users switch to the Chitika ad network, which has already set up a welcome page for YPN members.
http://searchengineland.com/yahoo-shutters-its-publisher-network-39108