Don't know about that... There are plenty of games (including DTG's own train sim) where official DLC, 3rd party addons and freeware mods coexist. If anything, it is in DTG's best interest to encourage an active modding scene. Now let's just hope that they see it that way too
I do hope that there will be other places to get mods/addons from than Steam. Steam Workshop sure makes it easy to install mods, but it's a terrible place to find anything and even worse to find detailed info about what a particular mod does.
