https://www.reuters.com/article/us-facebook-reliance-jio/facebook-invests-5-7-billion-in-reliance-unit-to-reach-small-indian-grocers-idUSKCN22404I >Facebook will spend $5.7 billion for 10% of Reliance Industries's digital business, as the social media firm looks to leverage its popular WhatsApp messenger to offer digital payment services to small grocers in India.