I personally haven't, but I can tell it's definitely a fetish site, and or, a site where cam models post exclusive work.
For $39.99 I can only hope it's exclusive!
Yes the clips are very high priced, which I imagine means the content has to be niche, custom, or hard to find.
So most of it is BDSM stuff, or categories like festing, femdom, foot, vore, facebusting, farting, I don't know just whatever thing your girlfriend is not into lol