[inbetween]

Freeware versus open source is a good point. But freeware typically can't be modified by the recipient, whereas downloadable models and open source code can. So I think there's still a need for a different term, neither open source nor freeware...

[dTal]

I would argue that the kind of modification you can do to a big blob of weights is more akin to fiddling with a binary in a hex editor than modifying source code. It is not the "preferred form" for the source, and you cannot cleanly and easily do things like modify its "alignment" - that is why people speak of "jailbreaking" these models. So I still think "freeware" works as a term.