Your game is fine as it is.

You don't hear that very often so I want to emphasize it - the game itself is fine. It needs some love, some changes and some extra content but right now there is nothing significantly wrong with it. The problem with retention is driven by a lack of new players, not new content. MMO's in general have very poor retention but from personal experiance I can tell you what makes a corp die is a lack of new blood that replaces the inevitable drain due to RL, not a lack of content.

So tell you something you don't *** know?

Well there is a few things that can be implemented that will help and be very little extra work.

1) Affiliate scheme

This is by far the biggest error made so far and the quickest win. Affiliates will advertise your game for you and will cost you nothing but a percentage of your income. Since your income is a potato and fifty *** post's from Ville I think your good.

Your competition is doing it:

http://communityclassic.eveonline.com/affiliate/

So what I suggest is this:

Set up an affiliate scheme that rewards people who get you subscriptions on a month by month basis. The competition pays up to 100% of the first month - what i'm suggesting is up to 50% of every month they stay subbed. This will not only bring people to the game but give people incentives to keep people in the game. Gaming guilds, folks like RPS and people who don't even play games but make money online will advertise your game for you.

something along the lines of:

20 people gets you 10% of monthly sub or 25% of the first month sub
50 people gets you 20% of monthly sub or 50% of the first month sub
100 people gets you 50% of monthly sub or 100% of the first month sub

You can amend the numbers to make them more economical in the future but for right now its got to be lucrative for people to want to do it. A half a pie is better than all the crumbs.

2) Make your communications and extra content periodical

I'm talking monthly Dev blogs and twice yearly expansions. It gives the players something to look forward to, some stability in the game and keeps people subbed for the next expansion. Firm expansion dates will also provide focus for the development team.

3) Daily doubles

This is probably the most work but is very successful in MMO's such as WOT. Every month you could have a week bonus to something such as Epriton yield or artifact loot, couple that with a once a week daily bonus to something and you give people reason to log in and play.

All these are small simple fix's that will generate new players and keep the people who are a part of this game playing. I hope you can bring them to us.