Not sure how the quoted examples fits with your link, TBH.

https://www.merriam-webster.com/grammar/descriptive-vs-presc...

Prescriptively, a "model weight" weighs nothing. Descriptively, this is stupid: a new meaning was created by common use.

*Common* use says the weights you can download and run locally are "open source". May not like it, but it's not one person acting alone; and neither are the objectors to the shifting language, it's just the former is more "common" than the latter.