Such a site did exist once upon a time, maybe you were aware of it, maybe not, it was called BaneWolfSC3, and later renamed Another Stage of History. I was a member, and it was a nice little nested community and a cool way to show off CaS, so it's definitely a winning formula, if you can get enough people posting content and staying active on it. The only concern I'd have is whether or not it would detract from the level of content posted on 8WAYRUN, or it would cause extra work to be posting your work in several places, if you were so inclined. I wasn't aware of 8WAYRUN back then, or I'd probably have been here instead, because 8WAYRUN seems like a more dedicated following than just a CaS site because there's other things involved. But if you did start it, I'd definitely check it out and post my stuff there, to help get it going to see if it was sustainable. I'm replying this way because I don't Twitter.