The six and eight can each be made five ways. So if you are up on the don't six, you have six ways to win (on the number seven) and five ways to lose. When the bet is $10 you would win $60, lose $50, and be ahead by $10 after the 11 decisions (on average) If you see a don't player about to take his bet down just say to the fellow: "Don't! Here's 10 bucks, you're even!" He'll take the $10 because that's what his bet is.