How much did they pay for Beluga in 2011 (which then became Facebook Messenger - an app that does pretty much the same as Whatsapp, if not more)? How little (if

How much did they pay for Beluga in 2011 (which then became Facebook Messenger - an app that does pretty much the same as Whatsapp, if not more)? How little (if anything) did they spend in Marketing that app since? Sounds like a costly mistake.