Ok we all know that if there was a required paid amount each month very few people would play it. A optional one with bonuses could work. I think that with some tweaks and once the player community builds up you could have it be a monthly subscription. Here's a few things I think you would have to do to do this (Some of which have already been listed)
STOP LETTING HACKERS BACK!!! (I know many people who have quit because of this)
Let the players have a bit more say in the update (I know you do this for some things but not all like the time you messed with the cloak)
FIx Game Lag. This is very important since it affect almost everyone at one time or another at the current game graphics. If graphics are updated there will be even more lag!!! I have seen and heard of many people dying, not being able to open sge and other things from game lag. They will have fine ping. IT IS GAME LAG
Do what it best for the players, not what makes you the most money. (like letting hackers who regularly buy tokens back) Really you are LOSING money from doing this. This is pretty much how I figure. You do what's best for you and players don't like it and quit. That makes less players to buy tokens. You make the players happy there are more players to buy tokens.
Things need to be more balanced. For example, surface missiles are a great use if your playing Fallen Empire. If you go to most any permanent you will rarely see them used. You could up the power and range of them on certain servers. There are many things that are umballenced that is a nit very good example from the top of my head.
Advertise your game a bit. You can get relatively cheap ads on websites with less traffic than well visited ones.
Make the game easier for noobs. I think this is a great game once you know what you are doing and can do it. When you start out as a noob, the game can be very hard and frustrating. One thing I would suggest is getting rid of required tax on a colony when under UN protection. That way noobs could build their colonies without having to worry about the population loss and such because of the tax. Very few new players actually stay.
Make some way for players to know if you are on SGE and what server you are on, or a way to talk to you from any server. there are those few who use token announcements to try to find you but most of us don't. This feature would be especially helpful in getting bugs fixed ASAP.
Keep in mind that once the game gets more traffic, some servers may get too crowded. There may need to be a player cap on servers or bigger galaxies or something.
There are defiantly tons of other things that need to be done and it would be no easy task. If anyone has any more to add please post