For example if Microsoft charge a $5 royalty per game, and a $5 manufacturing charge per disc then it's basically a royalty per disc even if Microsoft doesn't call it one. Actual manufacturing costs per disc would be cents and wouldn't be worth any kind of mention by either Carmack or Willets.
Cost of manufacturing could also be for those funky multi-disc cases which we never seem to get, so I assume they're super expensive.
But yeah, you could be right.







