Many popular SF trains have PT which is #FlexiFare actually and if observed closely most of 2A 3A PT berths remains un booked & finally ends up clearing GNWL
These HumSafars are actually Hum(WE) Safar(SUFFER) where passenger pays high fare & gets no extra service but often finds travel in low priority train.
Even Food charges are not included in fare so PC make mullah daily
(personal...
more... experience of HWH-YPR HS in Nov2017)
Moreover all the vacant berths sold 10% cheap over last fare band after charting.