Yeah, Angel Smalls and Ziggy Star have small GS segments at the end of her scenes in Bang.com. There's a new site called Assylum as well that produces this kind of content on a regular basis.
Anyway you guys are missing a couple things:
1) Some of the girls request him to omit the GS parts, the Dirty ATM (better known here as Balou Style), etc., and Pierre usually complies even up to the very mention of their existence within the unedited material. Not doing so, he risks sticky situations like Elsa Jean's case. And it's a matter of good will as well.
2) Max Hardcore's conviction on stupid charges of obscenity. Law in USA is a matter of interpretation in many cases, so one GS producer might roam free and another might get sued with the very much the same type of content. I'm no expert or collector, but I think everyone avoided shooting GS for years after MH's arrest, and only now some producers are starting to venture into these waters (pun intended

). Anyway, I believe one distinction is, regardless of passports, whether the content was shot in American soil or not.