This is so weird, like on one side congrats but on the other side not only are the sales tragic but the song clearly isn't popular at all over there (itunes now, spotify plays)
In all honesty, this is just because stans are the only ones buying music in most of the world. The Anglophone countries as well as Japan and South Korea are the only ones still buying music, and even then it's really only Japan where everyone is buying music rather than the HAC demographic.