But what should be the Etiquette of a player who can no longer win a game, with more than two players left?
Game 10364197

This picture was taken after yellow's turn. Here is what you need to know going into yellow's turn:
-yellow had 30 men on Hati
-I had 24 men on Belize
-Green had 8 men on Nicaragua, plus 3 1-man armies in cali, oregon and vancouver
-Green only had 2 cards, yellow only had two cards
So as you can see, yellow only has 33 men to try and take out 38 just to eliminate green and take his 2 cards, which yellow couldnt have cash.
I put myself in a position to have a 66% chance of winning this game, and yellow decided to screw me over when he had a 0% chance of winning. Now Pink will take out yellow and win, with or without a set.
Total bullshit move on yellow (Captain) to just hand pink the game.