AppGrowthLab (by SplitMetrics) - 55 app growth lessons from 30 app marketing experts
Marketing Examples - A gallery of real world marketing case studies. Updated every day.
The Creative Marketer - Techniques & tools for copywriters, marketers, and creatives
Kickstart Side Hustle Newsletter - Dwarf-size newsletter with viral marketing case studies
Adapty - Low-code price personalization for in-app subscriptions
Growth.Design Case Studies - Product tips… in a comic book format