I agree with zefir.
Got it for free, but I appreciate it that much more. It offers immerse value.
Also shipping to your side
alone costs 1,5k yen, which at the current exchange rate 19$ !!
So much for bbit's claim/estimate of 4,95$, well maybe if you live in Korea you could get the shipping done for that much
Not to mention manufacturing price, shipping costs to Japan, logo printing {if you chose one with mt.gox logo}, possible customs clearance expenses if bought in bulk.
I say they have no profit from this whatsoever, just handling trouble and a good feeling from customer satisfaction.
The comparison to other companies that charge you for such authentication items has already been done, hell even my fking bank to whom I regularly pay for account keeping, charges me 5€ for a auth. plastic card worth 0,10€!! so I have nothing more to add.