Two guests for the latest Echo Chamber episode. WE Communications international president Alan VanderMolen drops by to discuss holding groups vs independent networks, why Amazon's Alexa is 'homicide on brands' and the rise of management consultancies in the marketing communications world. Then WARC head of content David Tiltman visits the show to explore lessons from the WARC100 annual ranking of the world's top marketing campaigns — including the resurgence of TV, moment-based marketing, consumer participation and purpose vs sales, amid a recent spate of high-profile advertising missteps.