SAN JUAN, Puerto Rico — Retailers that sell advertising aren’t confined to ecommerce giants like Amazon or big-box empires like Walmart. The club includes travel platforms, proving that if something helps people spend money, someone will eventually sell ads next to it. Among those companies members is Tripadvisor, where vacation dreams, hotel reviews and arguments … Continue reading Retail Media Wants a Vacation, Too: Tripadvisor’s Christine Maguire