I test so many things in PvP about the way to earn chest reward in PvP with the following methods.
-Do maximum afford. Usually lead to 100+ scores.
-Do low effort. Only resurrect other people and capture area.
-Capture 1 control point or resurrect 1 people to get 10 point or knock 1 guy and gone afk and wait for winning or join winning team.
The last method is just unacceptable and even you get 200 points but lose, the reward point is so low that will not encourage people or as you know, swipe to winning team. Even if you play just for fun, the winning side will usually be 1 side zerging and the losing team will usually be the team that fulfill with noob and/or newbie, how good is this?
Also what I mean is that ANET SHOULD FIX THE REWARD SCALING AND PROBABLY TEAM BALANCE. (Exclude volunteer to join losing side.)