that is very interesting idea, I definitely can have their landing pages and already has their URLs, but how to show that data? A different image for each hour?

that is very interesting idea, I definitely can have their landing pages and already has their URLs, but how to show that data? A different image for each hour? I can show unique landing pages so you can look at detect if they are doing A/B testing or not. Tracking might be doable too, but again problem is data presentation. Do you mean url parameters? I already have that data, how to present it? I agree with you that price is the most important data, but as you said I don't think there is a reliable way of getting that! How useful you find this service as is?