Still trying to figure out how Hunger Games opened to 152 a few years ago. Thought it was astoundingly bland for such a colossal hit. Even before I saw it, though... trailer looked weak, female protagonist, obvious Twilight-wannabe. Dumbfounded to this day that 40-45% of its audience was male and that the series has basically become the new Harry Potter.
I never looked at the books' sales. I guess the answer is in those.