Isn't that how the concept of a quisp became popular with postals? I viewed them as a reward for cleaning off the labeling.

I have traditionally used postage stamps instead of slogging into the PO which is a time saver for me. Often hard to get to a PO during working hours except on Saturday.

It also saves the recipient cleaning time. When using stamps the PO doesn't slap a postage sticker and tracker sticker on the envelope. Downside is there isn't tracking.

If one of my mailing ever comes with postage due, I will be happy to refund the boxer.

I love using Paypal to pay and print out my address/postage/tracking. I just print it out at home. Everything is on one sheet of regular paper, and I clear tape the edges to the postal envelope. No sticky mess! It also costs less, and I don't have to go the post office :)