It does seem like the new Oricon rules when it comes to event sales apply more towards Angerme then towards MM or Tsubaki Factory. Amped already complained about the label that Angerme is under. How else could they go down on the day the sales are counted for their largest event where they easily sell more the 3.000 singles.
This is why its good to also take into consideration the billboard sales numbers. It’s usually a better determiner of what their actual sales are.
Also I feel like this past year that the songs I am falling in love with are not the same songs the Japanese fan base are into.