Hey, my way of thinking, save a penny wherever you can. When the Post Office wants to provide something useful for free, well......

On the other side, we would also then need a return address label. So there would be two labels to put on the envelope. Could use a larger label, but then label costs go up. With two labels, the hand work costs go up. Sometimes I think you can't win no matter what.

Keep the ideas coming, many of them turn into very usable options.