User blog comment:Blacknumber1/1ST EVER CREEPYPASTA FREESTYLE CHALLENGE - Official Page/@comment-26030957-20150205020216/@comment-25226524-20150205021123

Well I'm not involved with this, but it appears you're supposed to submit it as you would a normal pasta by using the contribute button, but before you submit it you need to put the freestyle template (as shown above) at the top of your story, and also add the category that was created specifically for this event. Once you've submitted it, then you post a link to the story here.