Did they change it back? Reading the guidelines themselves...
2.5.16 Widgets, extensions, and notifications should be related to the content and functionality of your app.
2.5.18 Display advertising should be limited to your main app binary, and should not be included in extensions, App Clips, widgets, notifications, keyboards, watchOS apps, etc.
2.5.16 Widgets, extensions, and notifications should be related to the content and functionality of your app.
2.5.18 Display advertising should be limited to your main app binary, and should not be included in extensions, App Clips, widgets, notifications, keyboards, watchOS apps, etc.