No, there are no such subreddits - each subreddit is real people who can get tired of you or Hive links at some point and change rules or report you.

You should be also active on Reddit in ways other than just sharing links. Rules also change from time to time, new features, etc. So you never know what will happen. If you only share Hive links on Reddit, they might eventually suspend your account - not for sure but they might. Reddit doesn't mind we share links to our own projects but, if this is the only thing we do on Reddit, Reddit disapproves of this - this is a general rule.