The site counts approving a post as an edit,
but doesn’t show it unless the post is edited later.
Since the software upgrade, comments are timestamped with the time the post is approved by a moderator instead of the time the poster submitted the comment, as the site timestamped it from the Card founding in June 2008 through March 2017.
Yes, really. Well, maybe that’s not exactly how it works on the back end, but that’s how it appears from the outside. (You can ask Mod-29 if he/she made any changes to my posts in >this thread< – I’m pretty sure they went through exactly as I wrote them the first time.)