She is very naive. Clearly new at this. She thinking nude/semi- wont get leaked?? Her audience are boys/men. That's what our gender does. We need to brag and show our buddies.
I was part of LeynaInu group that paid for $500 God Tier content per month. It had some nudes, no videos, and no vag shots (15 pix for $500! per month). . This was a girl that NEVER got fully nude but that $500 tier showed her tits. And guess what, we STILL shared that $500 garbage. She was pissed, but she kept putting it out. What did happen is she became so hooked to the easy big money ($300k/month) that she started doing b/g content. Took years, but it did happen.
So, there is nothing Siren can do about it. Password-protect all you want young lady. It won't help. Pricing it too high will only price out most of her audience. And it will STILL (likely) be leaked. Congratulations, young Miss, you're going to be Google famous no matter what.
She needs to learn to exploit this not fight it. Spray your watermarked url at least 100 times randomly all over that image/frame so when its leaked newbies will know how to find you and no leak site has a way to cut it out to show their image over it.