We’ve been keeping track of the chat app trend for some time, and experts say that platforms like WhatsApp, WeChat, and Line are “posing risks” for social media giant Facebook. It’s also estimated that users click on Facebook-owned WhatsApp and Messenger 25 to 30 times a day, compared to 15 times a day for the main Facebook feed. The current ad-free status of these “clannish” communication modes means that though they are more popular, they don’t generate as much revenue. (WSJ)