Measure a campaign in a supply-constrained market

Measure impactHard

Problem. A campaign ran in a city that was supply-constrained. Demand (app opens, requests) rose, but leadership asks the real impact. How do you measure it, given the marketplace?

Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.