So I have a ton of itunes credit on my apple ID. I'm also tempted to sign up to Apple Music, and may as well have Family Sharing to share the subscription with the other family members. From what I understand with Family Sharing however, my itunes credit cannot be used for purchases that the family makes, it will always come off my credit card (why oh why did they do this?!) - unless they have itunes credit of their own (they don't). So, if I enrol into Apple Music (Family Sharing), then after 3 months trial - will my itunes credit be used up, or will it ignore it and charge direct to my card? Thanks!