I think it is some king of organization and has nothing to do with bitcointalk rankings. But I am not really sure though.
Nope, it's not a kind of organization and it has something to do with bitcointalk ranking. Newbies aren't allowed to post image and that's the purpose of purchasing a Copper Membership, just refer to the links that are given to this thread.
I think be copper is not too benefit
It's beneficial for those who are creating ANN threads and is/are new to the forum who wants to post an image.
@OP you can purchase Copper Membership and it will serve you like having custom title with that tag.