there is about 10-20 really active players on each server. it would be a lot more if the developpers fixed the bugs and enabled championship, artifacts, kingdom lvl 7 construction.
this game is a port of Siegelord that had about 200.000 players the first year. they upfated bugs and issues, made special events what made it interesting to keep playing.
in kings of war people quit as they discover after lvl 85 things are not working and developpers are not fixing issues.