Thomas Plantenga, CEO of Vinted, and Alex Taussig from Lightspeed discuss topics such as Thomas becoming CEO, Vinted's growth metrics and expansion strategy, the flaws of 'Rule of 40' and EBITDA optimization in startups, and the challenges of scaling a marketplace. They also talk about the impact of COVID-19 on Vinted, market entry priorities, and the European market. In the episode, they provide valuable insights into the mechanics of marketplaces and share their experiences in different markets.