Display MoreItzy was attacked for the same thing you are suggesting that it was mostly TWICE fans bulk buying their albums but that proved to be false just like NMIXX's Album Sales are their own merit.
NMIXX's Midsummer NMIXX dream sold 719k Albums on their first day, it's a record for a JYPE GG, they also hold the 3rd highest JYPE GG 1st Day Album Sales too.
The majority of Album Sales are through Pre-Orders meaning the Song Ranking is irrelevant since no-one but Insiders have heard the Title Track.
DigiPacks are the main factor for increasing album sales, at least since the 4th generation as they weren't widely used in the previous gens.
As for Company Stans, there aren't many that buy albums from anyone outside their bias, especially from JYPE that have 5 active South Korean Idol Groups
Exactly what I am thinking, who else would buy butch of albums from groups that I don't actually like, just supporting another group from the same company of my bias...