We all know that everybody loves xp. Some want to prestige to get the 10 best weapons in the game, while others want to get on top of the leader boards. Sometimes there are people who don't shoot at you and shoot boxes instead to get Tank Coins so they can get a weapon pack or deluxe. Sometimes I'm more busy trying to save up another 80 Tank Coins for the new weapon pack and I know I can't have both coins and xp. So I make a deal with people. If they didn't take any boxes then I wouldn't shoot at them at all so they can get MOAR xp and so I can get MOAR Tank Coins.
Well right now, I am not too concerned about prestiging. I am more focused on buffing up my tank, which means I need tank coins. However, if there is a floating crate, I would shoot through it to hit the enemy. So I maintain a balance between xp and tank coins.