I am not on a virtual account, I'm on my own servers, no one else is on my servers except for who I've put on my servers.
If you are on your own server then you can have as many real domains as you want for no extra charge except for the cost of buying the names.
I use a real domain for when that is best and sub folders for when that is best.
There are many advantages to making the root of the domain that you build your promotional stuff off of including the fact that it tends to get SE traffic and surfers poking around to see what is at the root of the domain of the gallery that they are looking at.
Basically what I'm trying to say is if you are not on your own server then you should really think about the fact that putting your hub/list list/thingy on its own domain probably is not the best idea since it means paying for another virtual account and most of your traffic is going to go to the domain that you are promoting off of anyway.