Just my opinion as an individual contributor who might want to use some of the material found on this message board.
The great bulk of what appears here is not copyrightable. You cannot copyright facts for example. The description of a watch or clock including serial numbers and decorations is not subject to copyright.
A theory about the organization of information i.e. patterns of serial numbers is also not copyrightable. It is an idea and ideas cannot be copyrighted.
In all the language content of the board, only the actual language can be copyrighted. Your clever phrases are copyrightable, but not the meaning of what you said.
The big item is images or photographs. Those can be and should be copyrighted by any owners who want to protect them. As has been pointed out, there are no images here at this time.
Many owners will be willing to donate images. I have had hundreds of images donated as support for the Waltham Database for example.
I personally have given a free non-commericial use license to all of my photographs to the public. It does annoy me when they are taken without credit. I also have a number of PowerPoint presentations on my web site and those may be freely copied as well by anyone who wants to use them in a non-commercial way. I don't know of anyone who has used them that way.
If you invent a new technique for repairing something, that descrption should be copyrighted. It is unlikely it can be patented, but that would be appropriate if viable.
These are my thoughts on the issue. They do not reflect any official position of the NAWCC.
I am sure we can work out some language that is viable for most of us. However, I feel and I think most people would feel that the issue is credit for ones work and ideas, not profit or income. Copyright only protects income. Strictures against plagiarism protect your right to be credited for your work.