After talking to some people and doing some math, We are going to try and keep Railroad Empire running as a subscription service. Since there needs to be free access to the game to keep the Google Maps implementation, there will be a free tier to the game still.
So here is what I am planning. The game as it stands today can be played by anyone with up to 10 trains. If you want to play more than 10 trains, You will have to subscribe. The subscription fee will be $2.50 / month or $25 / year. Facebook will only have the monthly option at the moment because that is all their subscription system supports.
When you subscribe you will no longer need to use Board Points.
There are still some things I need to work out about how all this will work and I have to write a bunch of code to support this, but I plan to try and do this quickly.
As long as we can get enough subscribers to offset the cost of running the game, the game will continue to run.
As always I look forward to hearing your comments, thoughts and concerns.