I had a simliar rejection because of my app's Rdio integration.
If the user had Rdio installed, my app would open the song in the Rdio native app.
If the user didn't have the app installed, my app would open the song on the Rdio web site in MobileSafari. Apple didn't like this since you could purchase an Rdio subscription on that webpage bypassing the IAP and Apple's 30% cut.
If the user had Rdio installed, my app would open the song in the Rdio native app.
If the user didn't have the app installed, my app would open the song on the Rdio web site in MobileSafari. Apple didn't like this since you could purchase an Rdio subscription on that webpage bypassing the IAP and Apple's 30% cut.