Facebook are edging on to Snapchats turf with disappearing messages. This is nothing new. Facebook have tried this multiple times.

Will this time be different? Is it even a feature we want on Facebook? What would be the business benefit?

Personally I think Facebook are over egging it. Secret  messages on messenger could be a breeding ground for questionable behaviour. There could be 'trolling', followed by denial because the message has gone.

There may be benefits. Perhaps disappearing customer complaints? Or limited time discount offers?