HBO Now has between 970,000 and 1.9 million subs, according to one Wall Street analyst. Looking to pierce the secrecy surrounding the recent launch of direct-to-consumer OTT video apps launched by HBO and other TV companies, Michael Nathanson of MoffettNathanson Research secured app download data from research company Sensor Tower. He used that data to draw rough estimates about subscriber totals. Jon Lafayette has the story.