it is more commercial friendly for smaller labels. Cause they cant put out many songs in one mini, the cost of production will be too huge and they might not be able to recoup if sales is not good.
For bigger label, they have no reason to so this. I hate YG for not giving proper mini to Rosé and Lisa. But till this day Im still mad that Blackpink first two single albums dont have physical release.. for collector this hurts
their first two single albums technically do have two physical releases- signed promo cds. but yeah it does suck.