On the CM campaign thread are often posted many applications wile the status is FULL and off-topic but many of the old time members don't like meaningless conversations there and report the posts. The campaign is very popular and everyone is trying to apply for it despite the fact that the campaign is always full. In your situation there's actually an open slot, but it's not yet being announced so I guess that's why there is no surprise that your post was removed, you need to make some research before you post a reply.