Judging by the large number of players signing up for this Pledge, you'd swear that the vast majority of players fight to the last in every game. When in reality the opposite is closer to the truth for most MP games.
Be interesting to see/hear how MP games play out from now on, and to see if this Pledge does have any of its intended effect of encouraging players to fight past their initial thoughts of "I just lost a few fights, so therefore I'm outta here". Time will tell