Actually, just changing the file name doesn’t change the format. If it works, it’s because whatever place you uploaded to already supported webp.
If you download a webp file and you really want jpg, you need to actually convert it, not just slap .jpg on the end.
Wasn’t she an unknown, while they were all famous stars, though?
The same happens today.
“The cast of Moana earned a total of $56 million. Auli’i Cravalho, who voiced the title character, made $200,000. Dwayne Johnson, who voiced Maui, earned $21 million. Temuera Morrison, who voiced Moana’s father, earned $2 million.”
I’m not excusing any of the ways they abused Garland. But it made her a star and she earned far more in future roles, just like Cravalho now commands a much higher salary.