The “Don’t Repeat Yourself” (DRY) principle is my main motivation for adding content to my site—especially to my “notes” section. I’ve gone as far as linking my own website in online class discussions (not as a citation; just for DRY).
This also combines really well with the Publish on your Own Site, Syndicate Elsewhere (POSSE) principle. Often, a post of mine syndicates well to multiple destinations. I might reply to a forum on my site and syndicate it to both that forum and to the Fediverse. People reply in both places, and Webmentions aggregate them together on my site (though I often have to send myself those mentions). I only have to write something once.
