This Week in Social is a weekly digest of some of the biggest stories in social media marketing news. These stories are the show notes for the Brave Ad World Podcast. Each story is discussed at a deeper level on the podcast.

This week’s headlines: Student Discovers Facebook Messenger-Based Payment System, Facebook Expands Mobile Audience Network, Snapchat Confirms Ad Rollout and Private Social Networks Called Into Question.

The week’s news quick hits: Yahoo Prepping for $10 Million Investment in Snapchat, Pinterest Launches Pin Picks Co-Marketing Effort with Media Companies, Facebook Working on Anonymous Sharing App, Facebook Introduces Local Awareness Ad Objective, Facebook Closes on WhatsApp Acquisition, Twitter Files Lawsuit to Publish Transparency Report, Google+ Gets Polls, French Bank Allows Money Transfers Using Tweets, Facebook Supports Stickers in Comments, Twitter Launches Audio Cards and Twitpic Shuts Down After All.