This is a really important topic to discuss considering the fact that the population is lower than ever: http://steamcharts.com/app/17710#1m

Anything you say about number of unique players a day in combination with the chart facts means people don't stay for long when come to play. Guess why.

It's awesome, but if you find the good time or friends to fill a server. Check for events as well.

Fight Club server has unstuck plugin. Look at bot and type !pull. Usually you don't need it, because the server unstucks bots automatically.