instead of No comments or No live chat you’d create a new page and make it a reply by adding a Backlinks… this is still not very clear

reply to a Page by Copy page the page into your own authorship, and then appending your own changes and reactions and replies in the new version, perhaps sharing the Diff view as your reply? this is not clear to me just yet. feels too clunky.

could pay out dividends to the original author via Pledge share

So it’s basically “new page with a back link to current page”