It was completely acceptable to allow derivative work - as long as it wasn't overdone. Everyone was using some sort of an unofficial "fair use policy" and everyone was happy. And people realized that their fans were the market and that fan-produced derivative works actually increased their profits by creating free support for their universes.
Things have changed, it seems.
When I created my setting a year ago, I was too lazy to design an entire background univserse for it, and took one out
of a series of novels of one of my favourite authors. Harmless non-commercial fan stuff, I thought.
Unfortunately the agents of this author actively hunt down even such stuff. Websites had to be changed or closed, fan
fiction had to be removed, and so on. And I have been told on another board never
to use any proper name from that
author's universe when writing anything about my setting, so "in public" I now use abbreviations and initials for such ma-
I am convinced that nothing like this will happen to Traveller fans and the OTU, but I think we should be aware that copy-
right issues are handled differently nowadays, and give Mongoose the time to sort out a problem that would not have been
seen as one not so long ago.