Speaking of postal history here is an interesting item a good friend of mine sent me as a gift. A no die cut Chinese Lunar New Year of the Horse (Scott 4846 var) single used to pay the first class rate and marked Return to Sender Postage Due. Evidently the stamp was not recognized as valid for postage. It is indeed tied by the bars cancel with a double marking on the backside May 16, 2016 and again June 28, 2016.
I think the modern no die cut press sheets, as polarizing as they have become, were interesting issues and maybe worthy of a nickname, such as Donahoe's Dillemmas. No die cut press sheets are a chapter that could have been taken out of James Farley's book, except they are already far more scarce than the Farley Follies.