Not sure permaban always have to do with something severe that you did, I got banned from a subreddit and after a month I asked the mods of the specific sub to let me back in, meanwhile the only thing I did is to comment to this sub with another connected account that I had, the mods all they did is to report me for no reason and reddit mods permabanned both my accounts, I never said anything bad or inappropriate, the site stinks real bad it’s simple as that