Large greeting card companies have seen revenue declines. But a smaller, vibrant craft industry in cards has emerged, and surprisingly, it’s attracting a new, younger customer.

Large greeting card companies have seen revenue declines. But a smaller, vibrant craft industry in cards has emerged, and surprisingly, it’s attracting a new, younger customer .

Another thing worth noting, Post said, is that holiday greeting cards don’t have to be reciprocated. “You can’t predict who is going to send one to you, so just make your list based on what ...