I take "on other music players" to mean other devices. If you have an Apple Music account, you can listen to the music on your MacBook, your iPhone, your iPad, and apparently also your Android phone. All of these devices are functioning as music players when you're playing the music you pay for on Apple Music.

The same goes for Netflix. Google does not try to take a cut of Netflix revenue even though you can only watch Netflix shows and movies through the Netflix first party application. You can, however, watch Netflix on many different devices.