alts are traded against btc.
I think since we are dealing with a lot rebels here too there could be a fair risk of a large part of trades going to litecoinmarkets and others. Seperating the altforum entirely will weaken bitcoin and strengthen altcoins particularly litecoin aswell as other alts which could be potentially then the coin of choice to trade other alts against if bitcoin is perceived as arrogant and elitist.

So seperating the two risks loosing demand for btc as the coin of choice to trade against.

I could be wrong but could happen. Seperating the forum could lead to seperation of groups (which is intended) and actually will weaken bitcoin.