As a related story, we (TMX) had contact with a magazine back in the days of Trackmania Original (maybe in 2004), and for them we made a pack of 100 maps from the site, which many of our users voted for on the forum. But the magazine in question wanted us (TMX) to grant them permission to publish the pack on their cover CD/webpage.
We said we couldn't grant them that permission becuase in our eyes the maps belong to the people who uploaded them, however, as they have uploaded them onto a free and public website, the maps could be probably considered to be in the public domain.
In the end, they did not publish the files. Its unlikely anyone would have challenged them about it, but commercial operations face these kind of questions as to what than can and can't use, or do.