Facebook's content issues are creating a 'tailwind' for Amazon's ad business (AMZN)

Amazon's advertising business may be benefiting from social media content issues elsewhere, says Jefferies analyst Brent Thill.
Amazon's ads won't be affected by questionable content found on social media.
Amazon's e-commerce and digital ad synergy is a killer combination, Thill said.
Thill expects Amazon's already growing digital ad market share to accelerate.  
Facebook's recent content woes are great news for Amazon's advertising business, a Jefferies analyst told Business Insider.