I appealed it and it was lifted, but not before it was upgraded to a permanent ban for ban-evasion on other accounts (I’ve never had more than one account in my 14 years of reddit.)

Reddit has a feature where there helpfully link your account to stranger’s accounts. When the stranger is banned from any sub, you are too. But you don’t know you are banned from those subs. So when you innocently post, you get perma-banned.