This works until one company monopolizes the market. See TripAdvisor. I've worked with seven different resorts/hotels doing web-dev and every single one of the

This works until one company monopolizes the market. See TripAdvisor. I've worked with seven different resorts/hotels doing web-dev and every single one of them absolutely hated TripAdvisor and wished it didn't exist and they didn't have to be on it to survive.