Frederick has already declined to cover Onision. He says that Greg has no arc and therefore wouldn't be interesting. Greg has done the same thing over and over for years, so a rabbit hole video would essentially be repeating: Greg is arrogant, Greg does something inappropriate/illegal, Greg pretends to be the victim, rinse, repeat.
In a way, he's right. Even compared to someone like Wings of Redemption, Greg has little to offer in terms of a long narrative. The only things that have changed in his life are the names of the girls he exploited and the places where he did it. He's the same lolrandom asshole he was in 2009, making the same videos, trying to screw and then screw over alt.girls. But even if things are repetitive, the actual details are still very interesting. Why he left the military, how he destroyed a young pop star's career and tried to destroy Al Jourgenson from Ministry with sexual abuse accusations, the IRS, the loss of money, the wetlands, and his other antics are sort of similar in the hubris and ridiculousness but are still interesting and infuriating. Maybe he'll change his mind but Frederick seems uninterested at the moment.