Tripadvisor decided to stop selling in Viator the tickets for visyting tigers and another animals that are closed in somme atractions around the world.
This way, they want to create in 2017 a new education portal to educate and sensibilize the new generations abouts the responsible travel and responsible tourism.
Well done Tripadvisor!

More info here: http://expresso.sapo.pt/internacional/2016-10-12-TripAdvisor-vai-deixar-de-vender-bilhetes-para-atracoes-com-animais-selvagens