Per person.
Out of 4x Qilins, the majority of us are getting a pouch. This is majority - as from time to time a good chunk of us wont get any - yet most of the time, the majority of us get a pouch as a minimum.
Have seen someone getting 2x pouches and comet in 4x Qilins - hence why my upper limit was about 4M - but most of the time most people in our group end up with a pouch. Maybe it is just luck though. All in all - you either get them or you don't.
So I will stand by my opinion that voidwatch is fine - yet WoE needs work. In fact WoE is in such a bad state that give it another month or two tops - and there will be just as many people doing Campaign as there are in WoE.... In fact sometimes that is already the case. WoE requires a decent head count for it to be worth while and yet with an aging game, and less and less people caring about scrolls/coins - the event is headed in the wrong direction.