I don't think I will ever spin any gachas, cause I use to many magas to stamina refill or continue lost fights for sake of farming all required for godification girls from the events
EDIT:
I wonder why on collection 1 gacha picture you can see the main guy sister. I don't think she is one of girl you can get in this game, so did they put her there on purpose to make some people who don't check actual roster of what is in gacha spin it trying to get her?