>>4908102 (lb)
“Instagram will most likely generate $14 billion in revenue this year and become an increasingly important driver for Facebook's growth, as the platform's core business is expected to slow, Jefferies analysts told clients Monday. The analysis highlighted the growing importance of Instagram, Facebook Messenger, and WhatsApp for the social network.”
https://markets.businessinsider.com/news/stocks/facebook-stock-price-instagram-will-drive-growth-jefferies-says-2019-1-1027886484
Good place to start — WhatsApp has already been called out…