Turns out it was pretty much a complete site rip. Only missing the Eden Adams scenes. There are only 15 scenes on the site. All from the 18 with Proof movies, #1, #2, #3.
The Eden Adams scene is easy to find since it's on VideoBox. As are, IIRC, all five films of the series.
I made a montage of the 15 pics from the site.
So, in conclusion, VideoBox has a more complete collection of the 18 with Proof scenes, than 18 with Proof. Another reason not to subscribe to anything but VideoBox.