Wait, what?

[Steve Jackson]

It's not at all unusual to print more than you need of X item just because printing only a few of X is not economical, but "ganging" it with other items gets a good unit price. The waste in creating separate film, printing press time, etc., would be greater than the waste from recycling a few pieces of paper.

To economically produce something more rare than "one card for every copy of the sheet you printed the smallest number of," you have to pick out some of that hyper-rare type and discard them.

But most companies just let the factory do the discarding, whereas we are having fun with it (and admitting exactly what we are up to).