https://www.theguardian.com/technology/2020/aug/24/microsoft-joins-court-battle-between-apple-and-fortnite-maker-epic

Dispute over in-app purchases is seen as proxy war over future of App Store

Microsoft has joined the court battle between Apple and Epic Games, filing a legal brief supporting the Fortnite developer’s right to carry on developing software for Mac and iOS while the case continues.