Also if you have ever bet with a Bookie that was a human and not a website he always charges you "juice". When I was younger I used to bet and if you lost you owed 10% of what you bet (A loss on a 50$ bet means you owe 55$). So the way I see it is they make you risk 110 to 100 so the "juice" is just built in when you make the wager rather then when you lose.