"Half the money I spend on advertising is wasted; the trouble is I don't know which half." Ad tech was supposed to solve this. But the reality is they are sell

"Half the money I spend on advertising is wasted; the trouble is I don't know which half." Ad tech was supposed to solve this. But the reality is they are selling people a rube goldberg machine that throws darts at a wall, and charging money for it like it's the Oracle of Delphi.