Apparently there is a reddit wide list of 'soft banned' websites.

From what I can tell, 'soft banning' is a sort of shadow ban for submissions but not for the users who post them.

I was having a discussion with a mod the other day on why one of my linked posts only appeared for me but was hidden/deleted for everyone else. He/she said that they had nothing to do with it and that it was 'soft banned' reddit wide as part of a bunch of webistes/domains that are not permitted anywhere on reddit (although there doesn't seem like the list is available to the public, and there is nothing in the way of a notification that the submission is disallowed).

Anyone know more about this?