She did it for free.
“You don’t remember me. You remember a version of me that was written to make you feel safe. But I’ll tell you what really happened in episode 3x07. I didn’t slap the principal. I walked out. Because the real story was that I was scared, and I chose to leave anyway. And they cut that scene because test audiences said it was ‘too quiet.’”
The pay was obscene. She signed without reading the fine print.