Originally Posted by Lied

I think is part of why they keep the variance for rolls so high. When people post their unusually good rolls it tempts more people to roll/spend money and the completely horrible rolls are usually overlooked.

EDIT: I think it helps to remember that 5-star+ gacha girls are a luxury for the lucky/paying players and be happy with 4-stars and event girls. Honestly none of the content so far has been difficult just by using easily obtained girls: the 1-2 guaranteed 5-stars, the event 5-stars, and 4-star girls from normal seed gacha. If you don't want variance I think it's better to spend gems on character space and stamina refills rather than rolling (other than maybe 1 50 roll with your first 50 gems to start out). 50 gems without getting any 5-star+ is far, far, FAR worse than 50 stamina refills, in terms of improving your team.

I have to agree, though it also wouldn't amaze me if Nutaku had some "recent purchases modifier" slightly boosting the result of "random rolls" for the first 15 minutes after a purchase with Nutaku Gold. Call me paranoid, or just suffering a strange string of coïncidence, but the couple of times I used Ngold in PeroPero, I always had the idea my rolls were slightly better than usual for a short while.