Not sure about Facecoin, but FB are definitely looking at how blockchain can help their business.

https://www.independent.co.uk/life-style/gadgets-and-tech/news/facebook-cryptocurrency-launch-bitcoin-blockchain-david-marcus-a8343261.html

"Mr Zuckerberg, revealed that his “personal challenge” for the year would be to explore the benefits of cryptocurrency and blockchain technology.

“One of the most interesting questions in technology right now is about centralization vs decentralization,” Mr Zuckerberg said in a Facebook post on 4 January.

Encryption and cryptocurrency "take power from centralized systems and put it back into people’s hands," he wrote. I’m interested to go deeper and study the positive and negative aspects of these technologies, and how best to use them in our services.”

-- Personally, I think it will be some time before this moves forward and they just do not want to be left behind if/when real adoption is realised.