*This reply is NOT a comentary on the PP, only using the scenario proposed to make a point*
This is the scenario that I think of when considering what goes wrong....now, with call only there is a single inquiry into the system for the ADR [made by the CM helping you]....as proposed, there will be 2, one by CM and one by the traveler....immediatlely doubling the load on the computer system. Now replicate the doubling a couple thousand times..

..Its a crash looking for a place to happen.. I also wonder how the system "pulls" available ADRs. If the computer responds to 2 inquiries [as outlined above] does it affect the visible availability? We've had some of the same discussions about rental cars....if there are multiple, unusable ressies [you only need one car, but book four to see what gets cheaper] then the supply/demand ratio goes out of whack and there is no "need" to discount. It seems like the multiple requests could have an adverse supply/demand effect on the overall "availability"....Anyone with a bigger brain able to explain how it would work?