Playboy on demand is an Internet based system and is pay as you go or subscription and is available to individuals on the Internet. A Television on demand channel is provided through TV programing suppliers. Playboy on Demand won't show up on Directv because of the differences. Here is a link to Showtime on Demand so you can see the differences. http://www.sho.com/site/schedules/od.do?source=shocom_nav
This is not true. Many other cable networks have both Playboy on Demand and Disney on Demand. In our area FIOS has both Playboy on Demand and Disney on Demand. So Directv should add both of them to be competitive with other on Demand systems.