The biggest problem with this game is its independence which has led to only a grass-roots-esque PR campaign which has led to only a small player base. What is needed now is some kind of injection into the game to kick it back into gear.

The easiest way I can think of is to throw the first paid campaign onto a PS Plus month (I have no idea of the behind the scenes logistics of this). Since you will have a month of curious people jumping into the PS4 version of the game it should hopefully be enough to keep folks around and have a lot more games being played.

I only have PC and a PS4 so I cannot speak for Microsoft's equivalent offerings but I think that this is the least expensive way to throw as many people at this as possible. Plus the way that PS Plus works, with users getting their games at a specific time, means that the players should be jumping into the fray all around the same time.