I went through the same thing. When link shorteners were all the rage, I wasn't the earliest adopter, but I re-submitted a few posts, once a piece, using a bit

I went through the same thing. When link shorteners were all the rage, I wasn't the earliest adopter, but I re-submitted a few posts, once a piece, using a bit.ly link, to track links across properties, all shortened, together. I purposely did this, but didn't realize that HN would view this as some sort of link scamming behavior to manipulate the system and they banned an account I had for 6+ months. I disputed, after a fellow HN user notified me (I was slow banned). I appealed to PG, who explained the situation. The account was never recovered. The point is, you'll get a chance to plead your case. But, it seems they don't haphazardly ban. Good Luck.