I'm assuming you're referring to the CAN-SPAM Act [1] or equivalent in other jurisdiction [2], but nothing of the sort is implied. The requirement is to make available and process opt-out without charge and promptly (typically in so many days).
It is neither dire nor prevents clarification, nor prescribes a specific experience related to unsubscribe links. It's odd to hear the only options are between receiving messages and having service terminated. That sounds pretty user-hostile tbh.
It is neither dire nor prevents clarification, nor prescribes a specific experience related to unsubscribe links. It's odd to hear the only options are between receiving messages and having service terminated. That sounds pretty user-hostile tbh.
[1] https://www.ftc.gov/tips-advice/business-center/guidance/can...
[2] https://www.lsoft.com/resources/optinlaws.asp