Obviously Abrogail isn't hoarding masochists! There are masochists right here! Not being hoarded!
And what is the actual point of this Dark Conspiracy? Keltham can imagine that there are some 'criminal-sociopaths' in Governance with sexualities not quite like his, who can get off on inflicting pain on somebody who isn't responding sexually to that and to whom it doesn't mean anything emotionally, and he can imagine that if those people had managed to secretly take over dath ilan anyways the criminal-sociopath-sadists among them would be having sex with nonmasochists so long as they were at it. He's not seeing that being the whole point of the Conspiracy.