On its path toward an initial public offering last year, hotel price-comparison site Trivago turned heads when it disclosed that its largest advertising customer was not parent-company Expedia and its brands, as was expected. Instead, it turned out, the Priceline Group, which owns rival Kayak, was the largest spender in Trivago’s hotel search results. In fact, the Priceline Group and its assorted brands, including Booking.com, Agoda, Priceline, and Rentalcars.com, accounted for 43 percent, or some $352.5 million, of Trivago’s total revenue in 2016, while Expedia companies such as Expedia, Hotels.com, Orbitz, and Travelocity, chipped in 36 percent, or around $295.1 million, according to Trivago financial filings. Get the full story at Skift