Since it's only a single, specific month's revenue, maybe this can be justified by Bang Dream and Love Live running really unpopular gachas and the rest having really popular ones in that month... I mean, the Silver Nova event... who doesn't need that precious smiling Haruka card–
...But still.
...But still.
Secondly, for the same reason, how is Bang Dream that close to AAside?
And last but by no means least, how the actual fricking hell are D4DJ and Assualt Lily 6 times higher grossing than Bang Dream?!?