Is this another repurposing and bastardization of “Open” or are these actually open? Should I even be asking?

It is in nvidia's interest to commoditize one's complement. These models make owning and using nvidia hardware more attractive - being open and all.

There's no incentive to "hide" the sauce.

It's under a Creative Commons Attribution license (CC-BY). That's about as open as it gets.

For any actual openness in released models the dataset they're trained on would have to be released as well, so yeah, it is a bastardisation.