Billy Boulia Voice Network Badge Voice Network contributor, an ongoing writer for our guest opinion column. Opinion Contributor@billybouliaBilly Boulia is a passionate social media and digital marketer with 13 years of experience in the social and digital fields. At Digitas, Billy leads social strategy for the New York, Boston and Atlanta regions. Voice 3 Ways to Craft a Successful Influencer Marketing Campaign It’s easy to get caught in a pitfall. Social Pro Daily 5 Things Brands Need to Know About Amazon Spark Opinion: In July, the $430 billion company rolled out Amazon Spark, a social feed of user-posted images.