[nelsonic]

Deeper integration into the most popular social network meaning more people have exposure to it. In terms of functionality, it won't be any different.

[A2017U1]

It will far more likely be a database under the hood than a cryptocurrency.

[beenBoutIT]

If you keep the default settings and use it to buy anything it will spam your 'friends' just like Farmville. "Joe Wilson just used Libra to remove the ransomware from his Dell, how will you use it?".

[tomglynch]

Functionality may be different - we don't know yet. It hasn't been announced how decentralised it will be.