Wow- interesting topic.
Hard to imagine an end to preaching because, as stated by so many, its the way dubs prove themselves to be worthy. Remember the scripture... 'hours cover a multitude of sins' - or maybe it doesn't say that, I get confused sometimes.
Perhaps, if they remove the need to report, they will institute an attendance record to gauge a persons spirituality. That is, simply counting the number of times you preach a month compared to actual hours.
Any of the reasons listed in the thread could be feasible for the org to go down this path of non-reporting, from financial to privacy concerns. Anything they do wouldn't surprise me.