Hmmn, I always think her hardcore fanbase (or more precisely, the ones who will buy whatever ayu releases) is around ~100K.. Wait a sec.. ahh I think it's getting harder now.
Days/GREEN had 120K on the first week, and we can assume that R/S will have around 93K on the first week.. The problem is, how many hardcore fans will buy all versions? If all hardcore fans buy every version, then it looks like ayu only has 30K hardcore fans (Days: 4 versions; R/S: 3 versions). Of course the probability of every fan buying all versions is very very low.. It is hard to guess... Someone from math department pls help me to solve this case lol

.