Using licenses to take a political stance is a valid idea. It’s even worthwhile, if there’s little uptake for it. Signaling opposition even if it’s symbolic only, has some value.
An aggressively scraping AI company could easily ignore it and it would be hard to prove a violation.
Ur is used in German a lot to signify something being ancient or the origin.
Großvater means grandfather. Urgroßvater means great-grandfather.
Ursuppe - Primordial soup
Urknall - Big Bang
Ursprung - Origin
English uses it as a loan word and prefix.