06/18/2026
Ever notice how we get completely sick of our own ad campaigns and kill them off right when they might finally be working?
De Beers launched "A Diamond Is Forever" in 1948, and it basically became part of the English language. Now that cheap lab diamonds are everywhere, they’re testing out a new message. But the lasting power of that original campaign teaches us two uncomfortable marketing realities.
First, we need to worry way more about campaign wear-in than wear-out.
And second, buyers don't always want a bargain. In biology, there's a concept called "costly signaling."
An engagement ring is supposed to be painfully expensive—that's how the buyer proves they actually care. Sometimes the high price isn't a barrier; it's the whole point.