Have you thought about moving?
I get that space has been busy look at the graph!
But I know that in 2008 there was loads going on in game despite the fact that people had to look for content, and could not expect content to come to them if they stayed in one area of space.
It must have been good because in about a year there were 50k logged in.
14 years is a long time for a game to exist, but what is a long time for someone to play the same game without a break?
1 year, two years, four years?
Up until 2008 growth was steady. As a result I would have been concerned if suddenly numbers fell.
But there was a huge spike c.2009, lots of new subs and players all at once, probably in part eVe going on Steam.
If lots of people start at once, then I would expect lots of people to leave at once, because while a game can last 14 years, for most people they are going to play 1, 2, 3, 4 maybe 8 years.
So until we can see if the current trend continues or levels of, I do not see cause for concern from the current number of players logged in, there may be other indicators of an unhealthy game.
But the idea that space is too big for people to have a good time and want to stay, if that was the case eVe would have died when M0o was a thing.