Blackmail is reasonable speculation, but he could have just kept all those videos to feed his sex addiction. That's why FBI/DOJ must release the full Epstein investigation. They must have record of the men & should have investigated whether they were blackmailed. Maybe his $ partner Wexner did that.
I keep using Wexner as the example of clearly more to this story, but you and/or others have pointed to Epstein's early relationship with Leon Black feeding him financially too. That arrangement was less inexplicable but still needs answer to why Black really hired a college dropout to do his taxes.