I as a free player have much bigger problem with SR-Gachas than R-Gachas.

They added 3 new SR-girls to SR-Gacha some time ago.
The girls can only be obtained from SR-Gachas.
I dont have any SR-Gacha and only way to get SR-Gacha seem to pay real Money.
No events give SR-Gachas. Only quests that can be done once and I have finished seems to give SR-Gachas.