I mean, dark patterns are all the rage nowadays in "good" marketing teams. We don't know how this affect their KPI as it is most likely different for every mail

I mean, dark patterns are all the rage nowadays in "good" marketing teams. We don't know how this affect their KPI as it is most likely different for every mailing list, depending on customer base and other factors. Using KPIs is a wonderful way of justifying neglecting common sense.