Because it acts as if there is no app store review possibility in case you wouldn't rate the app 5 stars. Didn't know of the Apple "equivalent", but that seems

Because it acts as if there is no app store review possibility in case you wouldn't rate the app 5 stars. Didn't know of the Apple "equivalent", but that seems so much better when it comes to giving users useful app store reviews. Of course all app developers would want their apps to have a 5 star average..