From what I've heard (and not much), Pro-Star is now called Empower Kickboxing... Still by the MATA organization, I believe.
I last saw some information on EKB at www.martialartsteachers.com about a month back
Once a member, you gain access to a massive resource library full of professional marketing materials for martial arts school owners. MATA and MAIA are mostly online-access. NAPMA is a physical package you receive every month (from my knowledge).
After reading many articles including debates over NAPMA, MAIA, MATA, etc., I decided to make a comparison list of the major Martial Arts Business Associations out there (mostly located in US)
1.) Martial Arts Teachers Association (MATA): "Martial Arts Marketing to Enroll More...