Thank you for sharing that information with the folks over at Discourse. The Bing team would be willing to assist and provide clarification.
I think @facan deserves some involvement here. He was the one who opened the ticket about three weeks ago. Such a feature might also fix this completely unrelated issue in return. It is an absolute win-win for you folks!
@Frédéric addressed some sort of throttling issue a while back, right? Im concerned that the issue might reappear if this feature were to be added, but I might as well check that before saying anything else. 
Best wishes on behalf of Fabrice Canel and Frédéric Dubut,
Jordi