They are not....
They could have said, if your app has social network log in, must support a more anonymous way as well.... and not must support Apple's login service..... which might/might not be good for users....
They could have said, if your app has social network log in, must support a more anonymous way as well.... and not must support Apple's login service..... which might/might not be good for users....
So it seems pretty targeted:apps that provide FB or Google sign in must also provide Apple sign in, which has an anonymous option.
As a user I’m loving this. Worrysome use of AppStore power aside...