E266: How Hey email (Hey.com) got 100,000 users in its first week.   Things covered: - Invitation-only marketing - Exploiting human biases and cognitive biases - The right way to use personal branding - Getting mainstream press with controversy - Design principles - How to use testimonials on a landing page - Being successful in a competitive market - How to give a free trial - More   Link to read the case study: https://kickstartsidehustle.com/how-hey-email-got-100k-users-in-the-first-week/   #CaseStudy #startups #ycombinator #customeracquisition   The Edward Show: Growth hacks, growth marketing, marketing case studies, and insights. Listen at https://edwardsturm.com/the-edward-show/