Space Station 14

I assume that's what's happening. It may also be growth that would have happened if there was any high pop server with open slots. There may be lots of people every day that download the game, open the launcher and see only empty or full servers, so they just uninstall the game. With Leviathan having had 50-60 pop recently, those players may have decided to play on Leviathan, joining the player base. Unfortunately I don't have access to the analytics that'd be needed to know what the actual answer is, or how much different things contributed. All I really know is that Leviathan still has much fewer issues than Lizard and higher levels of roleplay.