TripAdvisor’s Instant Booking lets hotel chains, independents, B&Bs, and online travel agencies (OTAs) use an auction bidding tool to fight over the coveted top spots in its metasearch results. Consumers see a difference, too. For any given search result, the topmost button of three hotel rates may be large and in gold and say “Book with TripAdvisor.” Users who click the button will be encouraged to submit their credit card information while remaining inside TripAdvisor’s “user interface shell”. The transaction process is completed on behalf of TripAdvisor by third parties. Before this launch, travelers who ran searches for hotels on TripAdvisor’s metasearch tool saw three potential room rates at a time. Each button displayed a price and the label of a third party, like He or she would click to the OTA to complete the transaction. Get the full story at Tnooz