Buyer beware. I recommend buying assets via a separate account not related to any subscriptions. If they wrongly charge you and you issue a chargeback via your credit card provider, they will block you without question. For me, it seems I will be out thousands in assets and forced to use a new account now that I have a need for Unity again.
Suggestion to Unity
Do not block customer access to third-party assets for first-party disputes. Allow users to login and not resubscribe, but blocking access to content that has been paid for in-full is borderline criminal.