Currently they have allocated 1 designer, 1 artist and 1 programmer.

Draginol's words:

On a typical day, an RTS like this sells let's say 50 units at $30 apiece.  That's $1,500.  Steam gets 30% so now you're at about $1,000 a day or $30,000  net a month.

That is enough income for 3 people to work on the game.  A designer, an engineer and an artist.

Hence, we have been steadily releasing new maps and units (for free). 

http://steamcommunity.com/app/507490/discussions/0/1495615865229446393/