the other teams probably made a point that by showing your emails on the front page the user would not have to click the ymail link and thus print two extra ads

the other teams probably made a point that by showing your emails on the front page the user would not have to click the ymail link and thus print two extra ads. hence losing money. what they get instead is less users overtime and lose progressively more. but hey, someone did his job of driving ads up that quarter.