>>58021227
It's not necessarily about the game itself but the timing. SM and USUM were only one year apart, basically pulling another BW but with major differences.

>The story was more or less the same
>The Mystery Gift wave for USUM ignored SM entirely
https://www.serebii.net/ultrasunultramoon/serialcode.shtml

Picrel was among them. I don't know if owners of BW1 were cucked this hard, but at least the timing of their releases was more spaced out.