(source: keeping an eye out on the NY subway, which I have found to be a pretty damned good gauge of consumer electronics popularity)
Camera quality is the second most important thing to me (after not needing finger enhancement surgery to hold the phone).
So, they designed it to fail, and it still was 3-5% of sales vs. ones that actually got good spec bumps every year. (If you’re upgrading the phone every 12 months, why buy the one with cameras a few years behind the curve?)
Anyway, I like my mini. I wish it had touch id instead.