I can draw a parallel here to publishing in academia. People say it is so cut throat, but I've always benefited from a collegial approach by supporting faculty and adding co-authors to my work. Now as an editor, I get immense joy in mentoring and guiding authors through manuscripts to the finish line that would have otherwise been instant rejections.

Your list is comprehensive and a good way to support writers. I think it's mutually beneficial in ways that are not apparent.