Sure in the long term it is a loosing strategy,you get lost in your work,you fed up suscribers and they quit and people posting them really do not care about the scene.I know it's to combat piracy but at some point the pent up frustration will boil over to where some people just say fuck it and quit
they get rewarded by the number of downloads.
usually scenes do not last very long around a month or two so updating it makes them available again.
Big websites are perfectly aware of this strategy that is why nobody update scenes.
plus i am sure PW loose a hell of time moving his logo around the screen when editing scenes.
i checked around and i saw no hidden updated scenes.