YPN can be considered as one of the best alternative to Google Adsense. Yahoo is one of industrial giant who can challenge Google monopoly. Yahoo is a trust worthy company. So there is nothing to worry about payments. YPN serves contents based ads same as Google Adsense. But unfortunately YPN is still in beta stage. You should have valid U.S. Social Security or Tax ID number, and web site content that is predominantly in English and targeted at a U.S. user base to participate in the program. Let us see some characteristics of the program. (1) Free to join. (2) Content related ads. (3) Not permitted to display ads from the other network on the same page at the same time as your Yahoo! Publisher Network ads are displayed. (4) Cost-per-click basis, so advertisers are charged only when Internet users click on their ads. (5) Ability to filter competitive listings. (6) 4 Payment methods. (7) Minimum payment amount $100, but for paypal method $50.