I bought a feral box thing hoping for the black kitty ears -working on a new costume idea and none are in shops-
Anyway, according to subetahq it says:
I got two, the and the Am I missing something?
I think 8 is the max amount you can get. I opened several of those and got a variance of 2-5 items myself.
Maybe they changed things around and the HQ just hasn't been updated yet?
It used to cost more, and give you more, but then they lowered the price, and it's random now, giving 2-8 items now. It's a one use item.

Max 8 items per box, if you're lucky.
Sorry I can't seem to word my posts right. Hope someone else can come clear things up.
You should always double check SubetaHQ against SubetaLodge and sometimes even ask around on the forums. I've found that there is often a lot of stuff that it out of date/inaccurate on HQ. :/
I remember earlier someone posting in the battle forum about the HQ being behind is updating weapon stats why that just dawns on me now, instead of earlier XD
Well, at least you didn't pay the older higher price for it.. right? I almost made a similar mistake one day, but I double checked at the very last minute and luckily saved myself from wasting some sP.