Comms = subs, though it'll take a while to catch on I guess.
OP is OP. Though even in Reddit it was somewhat interchangeable between the person who created the post, and the person who posted the top comment of whatever discussion is ongoing.
Edit etiquette should stay. Ninja edits are rude, unless you're fixing typos. Even edits made instantly after a post/comment can sometimes show up much later than the original post due to federation latency.
You have a funny way of spelling Republicans