from your list, it's the only thing it's not correct:
there's a site wide shadow-ban that is only done by admins. that means if you post something, nobody will see but for you everything will show up as normal. subreddit moderators can approve your comment and it will show up. this started as a measure against spammers but it seems like normal users get shadow banned too.
now there's normal ban, where you can be banned from a subreddit (you can't post but you can browse) and there's a reddit-wide ban (your account gets basically deleted).
and there's also AutoModerator "shadow-ban" which makes use of reddit's auto moderator to delete a user's comment as soon as it get posted.
How do you know the latter are rare, as they're not publicly disclosed. You only find out the former potentially if you're the a moderator, or perhaps the person banned. The banning of subs you find out if you're in the sub, or watch every sub to check for bans. Or is there a banlist from reddit I don't know about?
> algorithms based on your personal taste,
only for recommending subs to try
> geolocation
only for recommending subs to try
> forced email
no it does not
> shadow banning
extremely rare, and per-sub, not reddit-wide
> banning of politically incorrect subreddits
extremely rare; most of why Reddit is publicly despised is because it allows politically incorrect subreddits.