HappySmile is a leading teeth-whitening brand based in Denmark. They work with large influencers and focus on customers who are not english and therefore not targeted by the large brands in their space. After a few weeks of Centrasyte running their ads, we noticed that teeth-whitening gel runs out almost exactly every 4 weeks. Centrasyte pitched the idea of building a recurring revenue subscription out as the main product and we haven't looked back since.