So i got my new AP jsk but why was this in the pocket?

 So today i got my order from mbok and i got a new AP jsk however there was a unused PAD in the pocket of the JSK.


....THE FUCK?!



There was nothing wrong with Jsk but why? 

(Came with free socks)

Just thought you guys might get a kick out of that.
It was rolled up like a present so i thought it was a thank you note or something nice.

Does anyone know why did someone did this or was it a stupid joke?