The Verge spotted the claim in Apple's 37-page opposition brief to the injunction sought by Epic
If Epic were truly concerned that it would suffer reputational injury from this dispute, it would not be engaging in these elaborate efforts to publicize it. From all appearances (including the #freefortnite campaign), Epic thinks its conduct here will engender goodwill, boost its reputation, and drive users to Fortnite, not the opposite. That is not harm."
Apple also claims that Epic doesn't make a lot of money from Fortnite on iOS
Epic has said Apple is the "smallest piece of the pie'" when it comes to revenue.
and here's the big one:
Epic started a fire, and poured gasoline on it, and now asks this Court for emergency assistance in putting it out, even though Epic can do so itself in an instant by simply adhering to the contractual terms that have profitably governed its relationship with Apple for years.
Epic Games lawsuit is just a publicity stunt, says Apple - 9to5Mac
In part of Apple's defence to the Epic Games lawsuit, the Cupertino company effectively accuses the Fortnite developer of filing the case as a publicity ...
9to5mac.com