If 50% of the customer base is Americans, you are going to need a new outlet for us as the revenue dwindles down from Betjam, Greek, bookmaker, dsi, SIA, etc
You've created a few of these contests in the past and have one currently which means you are trying to get into that area, but now its time to really push it for Americans. Get situated with them legally, become an affiliate to get kickbacks from, and then Americans can buy fantasy cash at these shops with their betpoints...and also Become a Pro using these sites....
Then, create a fantasy subforum. Hell, might even want to create www.fantasybookreview.com as I don't think sportsbooks will become legal here within the next 10 years.