"It lasted a surprisingly long time given that members of the cult were removing the ability to reproduce"
They recruited children in a Pied Piperish sort of way (there are real-life analogies that would probably get my post deleted).
Castrating Children in the Service of Male Sexuality
3 Dec 2021 - Genevieve Gluck
"In a paper titled From Heresy to Harm: Self-Castrators in the Civic Discourse of Late Tsarist Russia, Engelstein points out that children were recruited into the Skoptic sect:
“There are also many examples of children being put to the knife, sometimes by relatives who adopted the faith. Children also came into contact with the Skoptsy after being hired from their parents to work as apprentices and servants. Once among the sectarians, the children were raised in the spirit of the creed and allegedly kept from contact with their families. When questioned in court, almost all said they had sought castration of their own free will.”
Naturally, Skoptsy men, having participated in genital self-mutilation, were rendered unable to reproduce. It was necessary for the cult to reach out to children in order to grow their own numbers.
Engelstein explains that this was made possible by the fact that “the appearance of virtue among the Skoptsy aroused the peasants’ admiration”, and that their “repetitious recitations… exerted a powerful force” that created a “dependency”.
“The wealthy sectarian community provided shelter for vagrants and runaway criminals, whom they supplied with false papers and new names. To the poor peasant they offered relief from the military draft, escape from serfdom, economic support, and the hope of equality and fellowship. They adopted the children of their own needy relatives, took in orphans, and hired the offspring of impoverished villagers as apprentices.”
In modern times the Skoptsy sect has become the namesake of a male sexual disorder called Skoptic syndrome. The definition of Skoptic syndrome, “persistent preoccupation with castration or penectomy,” is listed as a form of gender dysphoria found under the Diagnostic and Statistical Manual of Mental Disorders (DSM) IV section 302.6: Gender Identity Disorder Not Otherwise Specified.
This definition of gender dysphoria has been obscured by means of “inclusivity”, a term which, in reality, reflects the forced inclusion of women and children into the sadomasochistic sexual proclivities of men in order to normalize either their own fetishes (paraphilias) or the renunciation of an overactive male sex drive."
https://genevievegluck.substack.com/p/castrating-children-in-the-service
Excellent article that also covers other castration cults and the known effects on the adult bodies of little boys who were castrated, eg. discovered from the skeletons of deceased Castrati singers.