Hey GH community, I'm working on setting up a funnel to measure our "pirate metrics" (AARRR) and improve conversion. In this video (https://growthhackers.com/videos/high-tempo-testing-with-a-growth-model/) Sean Ellis says that your activation metric should be something that "gives the user a first taste of your core product/value". That sentence changed my mind from having "email signups" as our Activation metric, to "Take Free Course". We're an eLearning company with mostly paid courses, and a handful of free ones to drive registrations (users don't register apart from taking a course). Therefore a first taste of our core value looks like learning something on our platform. Am I thinking right about this? Or would you recommend that the Activation metric be something different? Thanks!