Some people are simply unlucky, some are not. That's really all there is to it. I do spend a bit albeit the main part of my spending goes into 1.5x events to bloody get fairies and fodder to level stuff.

I mean, with 20 summons when i started DMM i got 4 blacks, that's just how it is. Many times when i have just noticed "oh i have 20SC, let's roll" i have gotten a black. Most of those times i spent nothing at all.

It really is in how you see things. You see people with 4+ blacks and think they must be whales. I see people who say they've spent 800SC without a black and think "How's that even possible? I'd have gotten like 10 blacks with that."

To give you some perspective on some of my rolls:

-As said, my first 20 summons on DMM yielded me 4 blacks. There was no money involved.

-I had 20 SC and decided to go for Leda when she came out, i got Esther instead. There was no money involved. This and a few others led sora to start joking that i have a 25% chance to get a black.

-I haven't spent any money on DMM since the start of the year, i have still gotten some blacks.

-When Kibahime and Lapis came out on DMM. I had 20SC and there were 2 new blacks i REALLY wanted! I bought a whole 150SC! I ended up getting both within 4 rolls. Yes, i would have gotten them both with just the 20 free SC i had -_- Later at different times i used those remaining SCs and got 2-3 blacks i believe.

That's just some examples for times when i did not actually spend anything. Currently i have placed an oath to not spend on DMM again unless a character with my irl name appears. At that point i shall whale til i get it. Unless it is an event unit, obviously.

I tend to spend quite a bit on nutaku when the 1.5x events come up. Depending on how much SC i have i will buy so i get to the 150SC limit for that month, use most of the stuff on dailies and the usually 30-50SC to roll. Tends to score me a black. That's about my usual spending. I don't spend every month though. There are units i will spend for, however, like Kayou. And if i am low because i just rolled and a collection event shows up i will spend to get enough SC to mincost the unit.