I think that idea that men use wealth to attract mates is pretty damn obvious, but I never really considered that women use displays of altruism to attract males. But makes sense that women would want to say "look! I'll make a good mommy! I am nice and selfless!"

But to go back to our usual question of women-in-tech, people often remark that women tend to go into fields that are more "helping" i.e. medical professions, non-profits. In general, I think the implication that women go into more "helping" fields and men go into more revenue generating fields is used to paint men in a bad light; but here they've shown that women are being just as selfish when they appear to be more altruistic than men. After all, they're much more likely to do charity when a potential mate is watching.