Facebook has adopted this approach from Whatsapp as they first tried the technique of limiting the number of people you can forward a message to in everyone’s top favorite chatting app and eventually the experiment also resulted into a significant decline in misinformation being spread.
Facebook Messenger is working on limiting the amount of threads a message can be forwarded at a time, in order to add frictions on misinformation. You can only hope Facebook’s attempt to put a break to all the wrong messages work!
If you'd like to distribute a message to a specific group that you're a part of, you can post in the group. All members of the group will be able to see your post, and the members who've allowed group notifications will also receive a notification about your post. That way you can message up to 150 people at once.