Like, obviously around here you don’t subscribe to a subreddit, were not on reddit.
What about referring to the Original Poster as OP?
What about etiquette like marking edited posts and comments with “Edit: added words or explanations of edits made”?
Most of those things came long before Reddit and still apply to just being online in general. Only the word “subreddit” is unique to Reddit, as well as certain in-jokes (“when does the narwhal bacon?”). Really thinking about it, I’m not sure Reddit was ever really unique at all. It just has a lot of users.
And to be fair, that whole narwhal bacon thing was a weird fad of internet culture as a whole, not just on Reddit (think pre-2014 internet imo)