It very much matters if this is to be used as precedent by Spotify in its legal proceedings against Apple.
You can be blameless and still be a hypocrite. Is Apple at _fault_ for this action? No. Corporate entities are gonna corporate entity. Does this reek of hypocrisy? Yes.
>Developers offering products within a game downloaded on Google Play or providing access to game content must use Google Play In-app Billing as the method of payment.
> Developers offering products within another category of app downloaded on Google Play must use Google Play In-app Billing as the method of payment, except for the following cases:
> . Payment is solely for physical products
> . Payment is for digital content that may be consumed outside of the app itself (e.g. songs that can be played on other music players).