That is exactly why, FB is private. IG is cool and public, lots of people don't cross the two and tinder is in with the younger crowd. They are betting on this

That is exactly why, FB is private. IG is cool and public, lots of people don't cross the two and tinder is in with the younger crowd. They are betting on this helping FB rather than driving the feature. FB knows that anything they make will be used by millions so at this point they are playing a different, longer game to try to drive general social impression. They know they are the default for a lot of things. Facebook's primary concerns and biggest fears are towards the impression of the company, privacy and 'cool' factor with the young crowd.