These are my still confused opinions on something I have thought about having spent 24/7 for over a year on a great server managed and "haunted" by so many dear friends, developers and builders.
Premise
I believe that a sort of code of conduct should be shared by any server owner who opens his/her server(s?) to the public using the MT servers list and allows access to anyone, though...
..the server owner because of many reasons is and should always be the only one to decide, but ... some guide lines and principles might be underlined and discussed since this community shares many values and this should mean something even for the servers maps final destination.
First: a disclaimer sign at the spawn point (or similar) explaining what would be the destination of the map in the always sad but likely case that the server might go offline forever, for any reason. (trash bin, private / public archive, available on demand, ...)
Why:
Knowing in advance the future of their own creations, the builders around the world would be able to decide which approach is best for them. Some architects/engineers are just experimenting and trying the tools, others are more experienced or just going to share their creations hopefully for the eternity.
It would be nice to show to our grand grand grand sons what their ancestors had been able to accomplish long before time travel, teleportation (????) and using such primitive tools such as these [i]phones, tablets, i3, i5, i7, ... using only a few GB of RAM instead of TB, PB, ... ZB... when analog developers and engineers still existed!
Second
The license under which the map will eventually be deployed to the world on doomsday or whenever.
Why:
This could be regarded as similar to any other copyleft work of art.
Third
Sharing the map of a dying server would be like sharing a source snapshot, that someone else might want to keep alive, fork or even merge with others in an always expanding universe of maps (this might be one of the most important reasons .to make MT manage unrestricted maps, and not to compete with others).
Why:
Our community developers have been acting this way every time, every day, for years. The server owner should or at least could decide to act like them.
I have personally fallen in love with Minetest because I was looking for an open source voxel game/application and its quality did the rest.
Merging great builds from [many] dead servers might open up new horizons to inspire new generations of builders and developers.