I don&#x27;t see how averages are relevant here. Android might have more usage among low-income users in <i>certain</i> countries, but in other countries (e.g. most of Europe) it has a vastly bigger market share, certainly not only because of low-income users. While the average ad impression on an iPhone might generate more revenue (that sounds about right), there are more ad impressions on Android in total, making this irrelevant to the topic of discussion. Additionally, the fact that a) country X is low-income on average and b) country X has a 90% Android market share doesn&#x27;t have any meaningful effect on the price of ad impressions in high-income country Y.