Why do WhatsApp Business accounts get banned?

For spam and policy breaks: messaging people who didn't opt in, unauthorized bulk or automated sending, selling banned goods such as alcohol or tobacco, or many customer blocks and reports.

• Unauthorized bulk or automated sending, such as third-party bulk-sender tools on the free app, breaks WhatsApp's terms. Large sends belong on the API.
• You may only contact people who gave you their number and agreed to hear from you.
• Customers can block or report you. Enough of that limits how many messages you can send, or removes your access.
• Selling or promoting banned goods such as alcohol, tobacco or drugs is a violation, even with a local licence.
• On the API, repeat violations escalate: warning, 1 or 3 day template block, 5, 7 or 30 day send block, account lock, then permanent removal.