Google used to have a service where you set a monthly spend and it would basically bid for ad space, using your money. Instead of displaying the actual ads, it

Google used to have a service where you set a monthly spend and it would basically bid for ad space, using your money. Instead of displaying the actual ads, it would display an image of your choosing. It was a pretty great idea and I can't remember what it was called, but it's no longer around as far as I can tell. Something like that on any ad supported platform would be pretty neat.