But yes, people still use postcards. Sometimes, they even mail them. I used to make Christmas postcards and mail them instead of regular Christmas cards. Cheaper postage, plus no envelopes to worry about. (And I used to decorate my cubicle with postcards.) I'd also think they'd be easier and cheaper to make than cards that fold over.
I like 11 X 17 posters. I have an easier time finding wall space for small posters. Not to mention that it's easier for me to handle smaller posters.
Yeah, but I can see that it might not be worth your limited time to print them up. Too bad. Glad you have lots of work, though!