Yeah I was also thinking (orthogonal to this specific post) that if you show people ads of things they were already going to buy, then you can attribute your im

Yeah I was also thinking (orthogonal to this specific post) that if you show people ads of things they were already going to buy, then you can attribute your impressions to the conversion. The business can become predicting what people will buy versus directly influencing what they buy. That isn't to say that there is no value to advertisers, but it might be oversold, especially for large brands.