Note to the people asking why this matters:<p>Legally, if you take a position in federal court on X (i.e., that it's okay to ban external transactions by apps using your app store), and you are found to be doing not-X in an analogous situation (i.e., setting up external transactions to avoid fees in your competitors' app store), the court can rule against you in the original case...and then sanction you <i>and your lawyers</i> for wasting the court's time proclaiming X...and then legally bar you from asserting X in those proceedings, or related proceedings.<p>Courts are generally okay with some form of alternative arguments, (i.e., I didn't do Y, but if I did Y it was legal for me to do so), but they absolutely will not accept <i>contradictory</i> arguments by the same party (It's okay for me to do Z but I won't allow others to do Z in the same situation).