Third post on this thread already, but I have another idea I wanted to throw out.
I don't think many of these creators understand that people leaking their content gives them a lot more exposure, its basically free publicity. I'd say that 80-90% of the OF girls I know about, I initially found them through leaked content. It's about the same for those I've subscribed to: maybe I initially stumble across one of their videos on a site, or saw it used in a compilation or something. I learned who the girl was and, if I liked her enough, I subscribed. It's that simple.
In other words, content leaks are basically free advertising for many of these creators without which they likely wouldn't have as many subscribers. For really established models this might not be an issue at this point, but for girls that are just starting out, a moderate amount of leaks is probably essential to boosting their popularity, otherwise they have to advertise themselves really well on reddit or twitter or whatever, which many porn consumers may not even use. Many just use tube sites and find OF models through leaks posted to tube sites, not through social media platforms.