Your product runs fantastic with 100 clients.
How about switching to the Mindcraft business model?
Let us download and host our own servers, with 100 player caps. You need the client to play, keep it at 40 dollars to purchase.
We set time or goals, leader boards, history, and restart/wipe when an "end" has been reached. Would make for interesting ongoing content. With the Terraforming that already exists, now or altered maps could be constructed. Individual server rule sets for conquest and territory control. Removal of save zones, or not, etc.