All messages users and businesses send to others will count against this new per-month limit, unless they get a response.
WhatsApp hasn’t said what the limit will be, as it’s testing different limits during this time.
However, when a business or an individual is about to hit the limit, the app will display a warning to those users with a pop-up showing the count, so they can avoid getting blocked from sending messages.
The company said the controls are designed to be effective against people and businesses that blast messages and spam people.
techcrunch.com