Rewarding players to rate your App is highly effective, specially if your players are invested in your game and your reward delivers meaning. A while a go I had my App PewDiePug with 40’000 Active users permanently banned because of rewarding them to leave a rating. After removing the behaviour on my other Apps and iOS Versions, Apple featured an app doing exactly so.

„Rewarding Players to rate the App“
@AppStore Features them
@GooglePlay Banns/Removes them

What is the official statement from Apple’s site?
Does Apple official accept this?