There is nothing really wrong with this in an RoR rated room, as assuming everyone is rated equally, the 3 winners would recieve 5 points each and the loser would lose about 15. Thus in so far as ratings is concerned, its balanced, you are 3 times more likely to win then to lose and you gain 1/3 less winning then you would losing. Or, if you played it 4 times, won 3 and lost 1, you would end up even.
In AoE, this is a major abuse, as if u played it 4 times, winning 3 and losing 1, you would recieve 16 points 3 times and lose 16 points once, thus end up gaining 32 points, a major problem
Its a stupid boring game, but not really a problem in so far as rating manipulation goes