Right now, if you upload an airport to the World Hub, you will never know if your submission has been approved or not. You also never know if someone has commented on your submission or not. You have to log back in and check your submission to see the status of your submission and if the moderators have left any comments.
Respectfully, this is not a good user experience. Many (most?) of us will not be logging into the World Hub on a daily basis, and I found one instance where someone’s airport was rejected and there was no further submission after that.
Additionally, I’m also not sure if the moderators get notifications, either. There have been times where I have uploaded an airport and a moderator has left a comment, and I have responded back, and I never heard anything in reply. I have not seen any indication so far that the moderators are trying to be mean or anything like that. I’m guessing that they simply don’t know someone has replied to a past submission, just as the rest of us don’t.