Facebook acquired Social conversation platform Branch for $15 million. Branch is a platform which provides the users a host to create and start conversations about anything and allow anyone to join. We got to know about this from Josh miller (co-founder of Branch) facebook post.
No official announcement either from Facebook or from Branch about the amount money Facebook paid for the social conversation platform Branch has came yet.
The social conversation platform Branch was officially launched by Twitter in 2013, and in 2011 its beta version was released at that time it was known as Roundtable. And now after 2 years company has decided to be a part of Facebook family.