I have no idea what that 16% were thinking.
My guess is those people were willing to pay to reward the other player for cooperating. (That is, they gain psychic value from the other person’s gain, and knowing it was the result of their actions.)
My guess is those people were willing to pay to reward the other player for cooperating. (That is, they gain psychic value from the other person’s gain, and knowing it was the result of their actions.)