Failin didn't say you need 50% or more battle activity or... I'm on some kind of exception list.

I noticed when I had less than 50% activity but stay alive all battle I didn't get boxes.

Where do I know? I'm a slow player. My priorities are: Minimize own loses and maximize enemy loses. Flanking, assists, sure kills (one shot one death), to be not detected, find covers, full functionality of crew (minimize crew's death). They are more important than: many caped circles, many kills, top place on the scoreboard.

This all causes I can make a few kills, a few assists, no own death and by in the tail of the scoreboard. When top players have wore results, more death but more points. And yes, I feel unappreciated by SL and RP because I play tank as a tank no like a Cunter Stroke.