Yes. I hate this too, but think of it as a bug, not the actual intention. We would love to know when you wouldn't buy a product as much as we would love to know when you actually would. But we don't, always, and end up having to make approximations. We don't always know what you actually bought, we just know you bought something. Advertisers don't even always tell the value of stuff you bought, something tht'd have benefited them to share from ROI pov etc.