"She" is of course an agency.
Plenty of those targeting young girls on IG, promising them good money for low effort content. I don't think any of these girls earn what they sell, they most probably receive a share from what the agency makes from operating their account. I guess it's an easy way to make some extra cash for students such as Liv. Most will make enough by just selling risky pics and videos, but very few will go full nude or hardcore. No idea how her OF is, as I'm not subscribed, but your experience doesn't surprise me one bit. She is also NN on cam, and never do private shows or PM ("Write to me on OF if you want to chat in private")
Cam sites like CB or SC are only used as a platform to advertise and make people want more and subscribe to their OF. I've lost count of how many girls like this there has been over the last few years.
That being said, I must say that Liv is honestly a breath of fresh air regarding streamers. She is always very nice and pleasant on her streams, at least compared to many other girls working for agencies. She says she is a psychology student, if that is true I don't know. But you can tell she is both quite perceptive regarding the most commonplace subjects and her comments are usually quite colorful. That being said, she could have been great if she wasn't restricted to her agency.