In parlays, people analyze games based on the data they have available at that time: injured players, who might play, who will be on the bench and who will start, what the best starting XI for each team is and many other things.

It turns out that not all games take place on the same day; some games will be played days later. So, if you placed 10 games with total odds of @50.00, bet $1, win 7 games, and have $18 available to cash out. Then, you hear that the key players in one of the three remaining games won't play, the right thing to do would be to cash out $18, because that's already a very decent profit. Even if you were placing single bets with a starting capital of $1, it would take a long time to get $18.