Why isn’t the Disaffection Index (DI) more popular with campaign marketers?

Many years ago, when self-proclaimed Email Diva and my own personal career doppelganger Melinda Krueger conceived of the Disaffection Index, my only qualms were with its name and acronym. She wrote about this campaign KPI in one of her MediaPost pieces. If I remember correctly, she even sent me a pre-read. I told her I …