I have also earned this badge for a question of mine. I would interpret this "zero-response" as the result of some, or all, of the following (assuming that the question covers the usual requirements for being on-topic, being clear, etc)

a) Too specialized a question

b) Too "textbook" as an issue (so everybody leaves the rather boring answer for everybody else)

c) Not textbook, but still dull

d) These are random processes and a zero-response has strictly positive probability of happening, just because of random variability.

I have also earned this badge for a question of mine. I would interpret this "zero-response" as the result of some, or all, of the following (assuming that the question covers the usual requirements for being on-topic, being clear, etc)

a) Too specialized a question

b) Too "textbook" as an issue (so everybody leaves the rather boring answer for everybody else)

c) Not textbook, but still dull

d) These are random processes and a zero-response has strictly positive probability of happening, just because of random variability.