As far as I see, there are 12 categories and all will have a first, a second and a third place. This means 12 Betnomi Ledgers, 12*12 mBTC + 12*6 mBTC + 12*3mBTC, so a total of 252 mBTC. A pretty big amount, isn't it? Excepting that, don;t forget also about the Betnomi recent raffles ([1], [2]) where even more Ledgers were awarded and where those which voted already (inside Bitcointalk Community Awards, of course) could pick two slots.

However I kindly ask you, for being 100% sure, to ask icopress fore specific details about the prizes. All I did above was pure math, like you did as well.