Facebook seems to slowly be building out the feature set that WeChat (https://a16z.com/2015/08/06/wechat-china-mobile-first/ ) has had for ages.

It seems like Facebook first set out to capture the whole market, and are now slowly monetizing it fully. WeChat has achieved incredible ARPU (>$7/user/year) through a combination of chat APIs, 3rd party bots and integrated payments Facebook. If Facebook can achieve a similar number, it would greatly increase their worldwide ARPU. (http://www.statista.com/statistics/251328/facebooks-average-...).