I interned on Atlas (FB's enterprise advertising platform purchased from MS a while back) and this was the impression I got.
Everything has a dollop of feel-good verbiage piled on top. We're not selling ads, we're "building more meaningful connections between businesses and their customers."
The initial value proposition of online ads was click = confirmed intent. When not enough people click, they construct increasingly convoluted notions of purchasing seconds of mindshare at a time. Of course, at a certain point these purchases become as untestable as a billboard on a highway, a big difference being that highway billboards don't prop up industries, ecosystems, and even geographical regions like online advertising does.
If someone calls shenanigans on online ads, it will be far more catastrophic than if they did the same on billboards/radio/TV ads.