The FAQ the message refers to lists:
5. A member’s status was gifted or earned during a promotion—what will happen to their status in 2023?
Members will need to meet the current Qualified Nights or Points threshold for the relevant tier based on activity between 1 January 2022 and 31 December 2022 to requalify for their statuses or upgrade to the next tier level. Elite statuses that were earned on a temporary basis as part of a promotion will be downgraded or maintained according to the terms of the promotion.
Opens the door for downgrades even if status was extended into 2023 by means of purcharsing/renewing AMB.