This is the best way to adevertise in this forum but its not that cheap , however many member here can notice your exchange having that ads and thats not bad exchange for the money you will use.
If they plan to become known quickly through the forum, they have to spend money for ads including the forum ad slots and also if they want tot, they can run a signature campaign but consistency is what they need.
How many people already registered in that exchange?
Let me clarify this information and get back to you!
I'm also interested about this, do you have an answer now?