To an economist, the strategy is obvious. Since even a penny is more valuable than nothing, it makes sense for Zelda to accept an offer as low as a penny--and, therefore, it makes sense for Annika to offer just a penny, keeping $19.99 for herself. But, economists be damned, that's not how normal people played the game. The Zeldas usually rejected offers below $3. They were apparently so disgusted by a lowball offer that they were willing to pay to express their disgust. Not that lowball offers happened very often. On average, the Annikas offered the Zeldas more than $6. Given how the game works, an offer this large was clearly meant to ward off rejection. But still, an average of $6--almost a third of the total amount--seemed pretty generous. Does that make it altruism? Maybe, but probably not. The Ultimatum player making the offer has something to gain--the avoidance of rejection--by giving more generously. As often happens in the real world, seemingly kind behaviors in Ultimatum are inextricably tied in with potentially selfish motivations.