They don't have to be told about the attack as part of the promotion. A group of stamp artists gets told "we want to make stamps of 50 different Russian monume

They don't have to be told about the attack as part of the promotion. A group of stamp artists gets told "we want to make stamps of 50 different Russian monuments getting blown up to support national unity." Then, they produce some art - Lenin's tomb, this bridge, the Kremlin, some sort of iconic skyscraper, etc. One of the 50 gets blown up, and a stamp line gets released. For bonus points, if one of those artists actually is a Russian asset, the Russians now waste resources guarding all the other monuments expecting future attacks. The screenshot-the-TV approach also works, and there are ML filters that can stylize that art, so we wouldn't know how the stamps were actually created.