I just posted something about cryptocurrency as an "Ask HN", and it was quickly flagged. It was a post I spent a bit of time thinking of, and thought it might lead to some interesting discussion, so I was disappointed.
On reddit you get a message from the mods, which usually points out why your post was removed, and how to amend and resubmit. Here you get no information, how are you supposed to proceed and learn what rules you've violated?
HN is lacking many features. Reddit has direct messages between users (inbox etc), HN barely has voting and flagging. Some users do what you did here: submit another Ask HN. You can also email the moderators, contact link is in the footer.