This is terrible behavior and it should be condemned, but I see no reason it should be illegal. There’s no deception in any of this. It’s like going to a store and asking an employee where the Widgets are, and they show you the Doodads instead because they’re more profitable. This is scummy but by no means illegal. The Doodads are labeled as Doodads. The advertisers know where their ads can be shown and under what conditions they’ll be charged for a click. It’s all dickish but it’s not fraud.