I can tell you from experience with my/my friends' past denied applications that activity is a very important factor in choosing staff here. You could be on for 8 hours a day in-game, but if you aren't helping out on forums and in Discord, then you'll be very unprepared when you're required to do so to handle support tickets, ban appeals, public questions, map submissions, etc on forums, as well as #help and #issues on Discord.