I play probably 5-10 hours actively a day @uzi
For reference use my Score, I get 0 Score during inactivity as I can't get any hunter kills.
This can also be seen by my communication with others ingame, the forums and the teamspeak as I am always actively communicating and for example calling for staff or filing a report if something bad happens.

Edit:
I calculated my "Active activity" at about 25 hours right now

I play probably 5-10 hours actively a day @uzi For reference use my Score, I get 0 Score during inactivity as I can't get any hunter kills. This can also be seen by my communication with others ingame, the forums and the teamspeak as I am always actively communicating and for example calling for staff or filing a report if something bad happens. Edit: I calculated my "Active activity" at about 25 hours right now