I just got a idea about Repost option is there in FileMaker (Jive) Community, It will help for all kind of community users!!
Why because some of Post we already posted, no one response at the time means, again they want to put a new post with same content. So here if 'Repost' option there means we can avoid duplicate posts.
If surely helps to reduce the same post repetitions on community ever!
Hope that Helps,