As creator of tracks for the sim nascar 2003, I can tell you that game would NOT be alive if it were not for me and my co-track creators putting out a steady stream of new quality tracks for the game. (along with cars and such but..I think a large part of it is the tracks)
In my opinion I think scavier should open up track making to people they deem qualified, IF that is they have a track making program or addon for 3dmax that makes it accessible to do so (like sandbox does for nr2k3). These tracks would be screened by mods/devs before release, and be official lfs addons with no illegal use of trademarks ect.
i would LOVE to try out some of my epic road courses WITH lfs's epic physics engine