Your question is Ad Pricing for Third-Party Apps. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you determine how much Spotify should pay for an ad in a third-party app?
Keep your answer focused on the pricing decision, not on building the ad product itself. Explain how you would estimate value, compare alternatives, and decide what Spotify should pay under uncertainty.