well, I don’t know about NA, but most JP FGO player (Japanese people, mostly) I followed on twitter folllows the same pattern. Males will show their beloved waifus servants screenshots (or drawings, whichever), while the females would show their waifus/husbandos’ screenshots (yes, the females are more diverse here, or from what I saw on twitter, at least).
Kintoki is one of a few male welfares and is the only one derived from FGO original servants, and I could see him loved (character-wise, not talking about fetishes) by either male or female (I would argue male players would love him more) because of his… um… how should I put it… yankee tendencies? While any incarnation of Gil is mostly targeted towards female players.
Given how scarce bishounen servants, I could imagine female players are more than willing to squeeze out a few more yens to whale for their husbandos, while the males prolly keep him more as a novelty than anything else.
While it sounds rather silly to make assumptions based primarily on male/female dichotomy in this day and age, remember that Japanese people, for the most part, still stick to their outdated hierarchy in many aspect of their lives, and while general audience won’t refuse freebies, there’s no meaning in having them if everyone else is also having it, so all in all, I strongly assume that DW won’t just let the money-making opportunity to pass like that.