The 'Merchant card Agreement' for the 4 major US (cards start with 3,4,5,6011) all have rules about billing before shipment. That applies to goods that ship per the order. OTOH A subscription is what you purchase, not a individual issue/item, so the charge at purchase time would not be in violation.
OTOH there is a few special cases: Special Custom built orders, Special pre-orders (in both cases the terms are up front). Refunds are generally not permitted after X event. Local laws may add additional terms.
A line in one agreement I had:
'Thou shall not disparage the card'
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