Do you think what reason makes Kinoko Nasu and Takashi Takeuchi decide that releasing no more than one Tamamo Nine member per new Fate title.

According to Fate/Samurai Remnant - Launch Interview, Higashide said “Higashide said “as anyone can imagine, releasing all of the Tamamo Nine in FGO is not a realistic slide”. I don’t get it since their imagination is truly out of this planet. I don’t get it since their imagination is truly out of this planet to me and many peoples