I just tried to get it. However, after two attempts where it didn't show me the catchpa, then two attempts to get through the one when it finally did, I decided I was fed up giving out my postcode to strangers (I'm still not sure why NASA needed it when I signed up to the Europa Clipper mission)
I know it's a freebie, which is very nice of them, but signing up for the newsletter (or not) should be enough.
If I do ever buy anything from the site, and the set is still on sale I shall pick it up, but for now my epic 40k figures will have to stay on their sprues