What often happen is to create a safe marketplace you are obligated to put restrictive rules simply to avoid a minority without ethic to abuse of the system.

I am going to try to make abstraction of these people and focus on people of good will, serious and that want to make business.

No brokerage exclusivity

So starting today, none of the domaining.com vertical marketplaces will force you to accept any brokerage exclusivity for list your domains.
Basically this means that if your domain is listed at PremiumDomains.com for example then you can at the same time list your domain in others marketplaces or if you find yourself a buyer you may sell it without owe anything.
Now there is an exception on this, an exception that is logical but that I prefer to expose:
If your domain has been sent to auction (3 to 7 days) then during the auction we have the brokerage exclusivity.

Flexible listing time

This lead to the another point, the listing time: Here also there are changes that will make you the live better.
There is 2 ways to sell domains:

HOLDING:
Generally you are willing to wait a long time the best end-user offer.
PremiumDomains.com and Catchy.com are marketplaces for domains you want to hold.

FLIPPING:
It’s when you want to make money quickly and are willing for that to accept a lower benefice.
BargainDomains.com and Flipping.co are marketplaces for domains you want to flip.

So now when you will list a domain you could list it for a specified amount of time or until sold.
But keep in mind this is just a way to automatically manage your listings, at anytime you should be able to remove yourself any of your listed domain.
Here again, while the domain is not in auction.

Implementation of the above will be up before the end of this week.