In trying to branch out to my audience, I stumbled upon the Negotiation Practice Community. Getting actively involved in the sessions with the leader, going above and beyond to contribute to within them, reaching out to the founder of the group and showing him my work, telling him I want to help build his great group.
That means we now have a bonafide group sessions section within Communitrain.com, helping people practice more, and I have a larger pool of potential users to tap into.
My next focus is to spend 90% of my efforts on marketing every day, particularly on Reddit, where negotiation subreddits are keen on improvement!