Earlier quoted context omitted.
Yet in the days of newspapers companies collected data to see how well their ads worked. There are a lot of statisticians working in this area - or there were 20 years ago.
The scam in online advertising is far more sinister; Google uses their panopticon to show your ad to a user who is just about to buy your product and then claim a conversion. So the stats look like Google is getting you thousands of conversions, when they only actually got a hundred people to look at your product who weren't already interested. This kind of bullshit was not possible in legacy advertisement. A billboa…
yes a lot of ad spend is wasted but they can prove what was still useful enough to be worth spending despite the waste and which was not.