paraphrase reword "In contrast to standard results on tiered prices, we find that high-type consumers may not pay as much as their full willingness-to-pay for ad avoidance, implying that the incentive-compatibility constraint of high-type consumers may not be binding. Finally, we extend the model to allow for heterogeneous advertisers, vary the decision sequence, permit platforms to compete on ad capacity (rather than ad price), entertain an alternative formulation of transportation cost, and consider correlated advertising reach