Apple had planned to cut those users off as soon as today, but now Epic reports that Apple has changed its mind.
For those who don't know, Sign In With Apple lets you login to an account with your existing Apple ID (that's the username and password you use when sorting out iCloud subscriptions and buying apps from the App Store). Now the company has tweeted that Apple will not allow Fortnite users to "Sign in with Apple" starting from September 11, 2020. If you used "Sign In with Apple", please make sure your email and password are up to date. While Apple technically now allows services like Xbox Game Streaming and Google Stadia on the App Store, they would have to publish each game as an individual app on the App Store. While not precluded outright, the requirement that they include a separate App Store app puts substantial requirements on service providers that many may not be able to comply with our for technical or practical reasons. This saga was also timed alongside Epic Games' broader complaints about in-app purchases on the games store.
Although Epic portrays itself as a modern corporate Robin Hood, in reality it is a multi-billion dollar enterprise that simply wants to pay nothing for the tremendous value it derives from the App Store. The company also asked for damages for harm to its reputation from frustrated Fortnite players and a public relations campaign Epic launched against Apple, which included a parody of Apple's "1984" television commercial and a playable apple-headed character called "Tart Tycoon" that bears some resemblance to Apple Chief Executive Tim Cook. Those who have a copy on their iPhone and iPad can continue to play, but won't be able to redownload the title if they ever delete it from their homescreen. The change comes after the New York Times reported https://www.nytimes.com/2020/07/28/technology/apple-app-store-airbnb-classpass.html that ClassPass, which had helped users book in-person appointments at gyms, became subject to Apple's fees.