It used to be common in Sweden to see stickers by the mail slot that read "No advertisement, please! But gladly the IKEA catalogue." They stopped distributing the printed catalogue long before 2021, but I've kept the sticker.
I almost miss the paper adds. Somehow they were wildly more relevant ...
[0] - I just realised that I only use the Scottish gender-neutral slang "postie" and don't know the correct one in standard English :D
The mailman proper, if I can call them that, did however deliver all stamped mail no matter what. The "no adds"-sign does not work for stamped adds, or like flyers put into the newspaper, etc.