Scenario: Designers want tighter cards to surface more content per scroll, hoping for higher session depth and ad load. You must measure scroll efficiency, user engagement, and investigate why U.S. revenue rises while Thailand’s drops. Question 1: If post card height shrinks 15 %, how would you measure impact? (Hint: visible posts per view, scroll speed, ad impressions) Question 2: After launch, U.S. revenue up but Thailand down—what actions next? (Hint: local content mix, bandwidth constraints, ad pricing)