Steffen Frølund is the founder and CEO of Bownty, a company that promises to find customers the best value experiences. Bownty has tripled its gross merchandise value in the last year to an annual run rate of 18 million euros. The company has 2 million users across 1200 cities. Frølund discusses how the Hawthorne effect, where any change results in a temporary productivity increase, applies to their A/B testing, with most tests initially increasing engagement but then falling. He stresses the importance of identifying what specifically caused real improvements when riding waves of rapid changes.