Talk:SE.RA.PH -Second Ballet-/@comment-35805549-20190219140932/@comment-24503208-20190219155420

Summer Servants that wasn't originally in Fate Extra (and CCC I think) since their original class in those two games was Caster and Saber respectively.

So I don't think they count since the event bonus usually involved servants who was in the story of the event itself IIRC.