Or, it demonstrates a lack of foresight by NASA to take advantage of an opportunity to sell a bunch of stamps over the following decades at wildly inflated prices.

There must be at least a handful of items that don't weight a lot per 1000 units that could have gone to the moon and back. I'm thinking pretty much any paper document or certificate, cash notes.

That's how Hearst funded the first round-the-world flight, on the Grad Zeppelin. Novelty stamps!

But mixed motivations can be confusing and demotivating.