The payout is the problem with the definition "altruism", you can always find a reason for which the person did it, even if it was just because she felt better

The payout is the problem with the definition "altruism", you can always find a reason for which the person did it, even if it was just because she felt better due to helping others. If you ask this question, you either have to have one example where there is no payout at all (note this should be an example most people agree on) or you accept there is no altruism, at least not following your definition of the word.