BugWhisperer, I've read about those videos as well, even had the opportunity to watch them but that kind of porn isn't to my taste.
But nothing you mentioned, outside of the scat, is far from what I've seen in a Max video.
I've never heard of Gillis working as a gay bottom.
He did get his dick sucked by dudes and trannies on film a few times, but I don't think getting your dick sucked makes you a bottom?
BTW Serena was amazing.