This may be a bit of an idiotic obviousness, but you market for now – not eternity.
Your ad will probably look horribly dated 10 years from now.
Any website more than 3 or 4 years old is going to look old-fashioned.
What’s popular or important or stylish changes. It’s also different from place to place, industry to industry, culture to culture.
You just can’t think about the ages when you do marketing. You have to be immersed in the here and the now.
Here are some great examples:
Creepy ads.
Ironic ads.