Ten years ago there was a $0.02 postage hike. It happens. You go to the post office for $0.02 stamps so you can use up the rest of your pre-hike stamp inventory. It’s a small pain.
Ten years ago Amazon.com sent me a sheet of $0.02 stamps. There was a note saying “we wanted to do something nice for you, we didn’t know what you needed or wanted, but we thought these would come in handy.”
Ten years ago and I still talk about it. I start to tell the story. People say “There he goes with the stamps again.”
Ten years of word of mouth. Two-cent stamps. It wouldn’t have worked if it weren’t a surprise. Ambush your customers with love.