It will probably have the same effect if a celebrity would stopped to give an autograph to a fan of theirs.. eventually the queue would never end and to escape from that you have to be a jerk and immediately stop and leave. So in the end eBay knows they will have to be a jerk in the end if they answer the endless questions and just not do it in the first place and be a jerk.

In both situation it will end the same.

Though I have seen former eBay employees doing an Asked me Anything on Reddit and their perspective of their life seems a bit interesting.. Though probably like 4 years old now..