And maybe it's stupid prediction, but I think it's possible that his account is controlled by more than one person. I just don't believe that normal people can live almost without sleep.
If you look at the posting time by dividing in two range, you will get different scenerio.
4th October to 27th November and 28th November to the rest.
The data provided by shah(can't remember the whole) shows the average posting time of my account. Before 27th November, I used to sleep late at night, sometimes even in 3,4,5 am while later 27th November, I started to live an usual life because I had joined in a job and that's why I had to sleep early like 11/11.30pm at maximum.
Anyway, this will not bring any benefit to this case, IMO.