Yeah. I remember such an ad in a German book I had. It was the only ad in that old book and this ad didn't age well: it was for a product not offered anymore. T

Yeah. I remember such an ad in a German book I had. It was the only ad in that old book and this ad didn't age well: it was for a product not offered anymore. This ad was tailored to the story, something like this: "In a different vein, wouldn't be it nice if the hero could enjoy product X?" It was on two pages such that you could tear it out. The first page was almost empty with a small teaser and on the other page you had the ad text and a small logo. I found it very weird and it is awful because it tears you out of the story. You lose the flow.