Sorry for the hiccup. It's in place as an anti spam measure. Bot accounts were getting on the site and posting images and links. At the moment, this is the most effective method we have for blocking them.
You can always reach out to the mods/admins of that site with this suggestion - I'm sure they would appreciate it. You can tell them its advanced options based on post counts so a member cannot post images/links/reply to threads/send PMs unless they've reached x amount of posts. They can choose whatever # they feel is reasonable.