And two of the biggest, Booking Holdings and Expedia, have been stepping back a bit. After all, hotel-metasearch site Trivago has been reeling over the last year as the Booking Holdings contribution to Trivago’s total revenue fell to 38 percent in the second quarter from 49 percent a year earlier. In 2017, TripAdvisor generated 43 percent of its revenue from Expedia, Booking, and their respective subsidiaries, and that was a drop-off from 2014-2016 when they accounted for a combined 46 percent of TripAdvisor’s total annual revenue. Get the full story at Skift Read also "TripAdvisor sees decline in hotel shoppers after OTA advertising reset" and "Trivago revenues slump"