Well, they're certainly free to have 80% of the $0 I charge per addon.... but here's what I want to know: what percentage of you commercial developers' sales generally come in the first 90 days? I'd imagine there's a pretty big taper with a new release, no? I mean, that sounds like a good way to milk the most money out of the content provider while the getting's good, and then let them have all they want of the dregs afterwards. For content that could be sold just as well by Flight1, JustFlight, Aerosim, or whoever...
You know what was great? How MS didn't give a damn. You could self-publish if you wanted, and keep all of the earnings. Now they want to milk money out of developers for the privilege of adding value to their product? Who do they think they are, Capitol records?
Has it occurred to them that developers can happily decline to develop for their platform? I mean, why pay the price for a lesson that Nintendo already taught everyone?