One place where I think ads are incentivised to be good is the starting ads on YouTube videos which have the "Skip" button. Once that button appears, if the ad

One place where I think ads are incentivised to be good is the starting ads on YouTube videos which have the "Skip" button. Once that button appears, if the ad is interesting enough, I keep on watching it. That means they have to work to make me want to see it. Jiggling belly fat won't do. I also sometimes get email spam ads from a forum I use. But the advertisers buy access to the mailout directly from the forum owners and the forum owners personally screen them to make sure they're relevant to their audience. There are cases that still exist which sound like your former experience. They're not horrible, just inconvenient.