Early Payment Discounts for Media and Entertainment Spend

With respect to practice of payment terms and early payment discounts prevailing to Media and Entertainment, I have following questions?

For the spend categories listed below;

• What are the prevailing payment terms?
• Suppliers / Supply market providing these services, are they amenable for availing Early payment discount?
• If yes, what are the EPD terms? What factors drive these in favorable of Buyer?
• The spend categories are ;
• Advertising , Sales and Promotion (example: vendors like Group M, Maxus Canada etc.)
• Media License and Rights (Fox movies, 20th Century, Sony films etc.)
• Exhibitors (Cinemark, Regal cinemas, etc.)
• Production House (Studio Canal, etc.)