A few thoughts:
When you are looking at production numbers, he makes more than molds than just those for the GB. There would be extras in case some get lost or damaged in the mail, plus some extras to sell. I would guess the number of extras depends on how popular he thinks the mold will be. Of my 5 MP molds, three were bought outside of GBs. One of them I bought a couple of years after the GB ended.
I hope Miha sells molds through other venues, too. Building a business solely on customers from a single website run by someone else would be risky.
As for shipping times, I've been amazed at how fast my molds got here. My in-laws live in Hungary, which isn't very far from Slovenia. They send packages to our kids several times a year. Delivery times range from 2 weeks to well over a month. Average seems to be 3-4 weeks.