... please don't expect us to change the current model of this game as long as it is working and as long as alternatives have a significant risk attached to them. That is just the economically sensible thing to do (and most other businesses would (or should) act in the same way.
Can you tell us more on how you define "significant risk" so we have a better idea on what types of changes you are open to?
I posted my suggestion under the "Missing Features" section before realizing this thread existed.
Can you share thoughts on creating a new "Pure Strategy Mode" gold feature? Seems like you could experiment with this pretty easily and turn off the Gold Feature if doesn't work out. You could also adjust the High Command cost to find a good balance between maximizing revenue and increasing new subscriptions/referrals. Perhaps offer a short promotion on 6 month subscriptions when the new feature launches? Just some ideas...