Facebook Messenger ditches Discover, demotes chat bots

Big changes with FB ChatBots! From March 1st you won't be able to send automated messages to clients that haven't interacted with you in the past 24 hours. Also, FB is changing the Messenger app with the focus of speed and simplicity instead of broad utility like China’s WeChat.

Source: https://techcrunch.com/2020/02/28/messenger-removes-discover/