Twitter re-examines verification; Facebook's data-mining App Lock, news for Watch, music licensing, location-based AR, and disappearing Messages; Snapchat user-generated AR lenses, story tagging, and branded Explore ads; GIPHY down; chronological Instagram; Microsoft Pix adds business card contacts to LinkedIn & ups business news; PLUS a live update from #SXSW courtesy of Brian Wallace of NowSourcing!