I read long ago (probably more than once) a short story that goes like this.
A man of a certain age (let’s call him Bob) mysteriously receives, unwanted, a subscription to Hereafter magazine – all about death: funerals, estate planning, that sort of thing. He angrily contacts the publisher, who explains that a crack team of actuaries has predicted that Bob will die within the next two years and is thus a prime prospect for Hereafter‘s advertisers.
Bob gets the wind up, resolving to prove the actuaries wrong, and triumphantly outlives the Hereafter subscription. But what’s this? It’s a subscription to Senility.
I was reminded of that story by a couple of spams for diabetes products.