Meta regulates their ecosystem engagement on WhatsApp by imposing dynamic and unspecified limits to how many WhatsApp marketing template messages users can receive from businesses in a given time period.
These per-user marketing template limits are dynamic and can be different for each user depending on their individual engagement towards marketing messages on WhatsApp. These limits are also based on the number of marketing conversations opened with a user from any business, and are not related to the specific interactions between users and a particular business. Meta does not provide details on what these limits are and when they are reset.
Meta blocked the delivery of this marketing template messages to the recipient.