As I explore the Web UI and API, I have discovered that requesters who use the Web UI (aka GUI, RUI) can not see or retrieve qualification requests. When we look at a HIT and see a link to "Request this qualification", most of the time this has no effect. A requester MUST use the API in order to view qualification requests, and even then it is not automatic. They have to send an operation (command) to retrieve them.
The moral of the story: If you feel that your qualification requests are falling on deaf ears, that's because they are!