Factual error: In the scene after they won the football game, the football players and cheerleaders all come running into the locker room. At no time would girls be allowed in a boy's locker room.
Factual error: The game the team plays was supposed to be the game to decide if they are going to make the playoffs. Usually those games are near the end of the season. If it was, they wouldn't have tryouts after the season is almost over. (They would have tryouts before the season started).
Chosen answer: Well, she is the most liked sibling, so she can probably get more out of her parents, or get money from both of them without the other knowing, or as we saw in the Gary Grills episode she can get money from people easily by telling them all sorts of stuff.