At my last job we had a customer who was famous for doing this. Since he generated a significant amount of sales, we couldn't just sideline him, so I learned to only ask one question at a time on email. Otherwise, if you asked e.g., three questions, it was a complete tossup as to which one he would decide to answer, all the while reminding you that this was a "hair on fire" issue for him.
Compounded with the fact that he was on another continent, multiple time zones away, this made debugging anything a difficult proposition.
We had another customer for the same product in the same country who had absolutely no problem answering whatever questions you asked him, in as much detail as he could supply. It has to be a personality thing.
At my last job we had a customer who was famous for doing this. Since he generated a significant amount of sales, we couldn't just sideline him, so I learned to only ask one question at a time on email. Otherwise, if you asked e.g., three questions, it was a complete tossup as to which one he would decide to answer, all the while reminding you that this was a "hair on fire" issue for him.
Compounded with the fact that he was on another continent, multiple time zones away, this made debugging anything a difficult proposition.
We had another customer for the same product in the same country who had absolutely no problem answering whatever questions you asked him, in as much detail as he could supply. It has to be a personality thing.