I wonder if email would be a reasonable way to enable interaction on twtxt… something like publishing an email address for replies in the preamble of your feed, then like twtxt the rest is up to you, but I could imagine a simple moderation queue that could be checked periodically allowing the admin to move approved comments into some public space… I keep thinking I’ll add activitypub comments to my site but it seems more complex than I care for. Ironically because of available tooling email actually feels simpler for this… of course, there is spam…