See the problem is that I can go into a Walmart and expect them to have at least 10 of whatever product I want to buy.  If they start to be out of stock every time I go there to buy it, then i'll have to go and buy it somewhere else.  Especially in crypto, you can't usually wait around for things to come to you.  I've been trying to use allcrypt today, but there just isn't enough volume or movement.  I like the exchange as well, but the only way i can move 2btc worth of the stuff is to sell at 38 right now, but that's where i'd want to be buying.

I guess people want "pretty" and functional exchanges or something.  I personally like the simplicity of Allcrypt but apparently some others don't or there's some other reason they're not there.  It is a mystery.