I didn't see the "categories" part of the rules, so I thought that each participating team, voting only once, in a game (other than their own), seemed fair. - If we have 50 games registered and 5 sponsors, it would be (50 + 5) votes to be distributed among the participants - The most voted, wins.
But I think it is better to wait for the responsible person's opinion: "Rodrigo Antunes" =)