[–] frankenmine 1 point 1 point 2 points (+2|-1) ago (edited ago)
Yes, it's silently deleted, similar to a shadowban. The user is not made aware of the removal.
The spam filter could have been an explanation except no other site has been hard banned before. The admins initially instituted a ban where the mods could not approve the automatically-removed posts and comments including Slimgur links even if they wanted to. That's clearly intentional.
[–] frankenmine 1 point 0 points 1 point (+1|-1) ago (edited ago)
Initially, no. They used an unprecedented measure for it. They may have programmed it just for Slimgur.
[–] cfl1 0 points 1 point 1 point (+1|-0) ago
https://archive.is/G0c6K (KIA thread unearthing the ban)