The best outcome is one click on the "unsubscribe" link, and you have sucessfully unsubscribed. This rarely happens.
  1. You are led to a screen that asks, "are you sure you want to unsubscribe?" and have to hit an extra button
  2. You are taken to a menu of various promotional emails and have to decide which ones, exactly, you don't want anymore, leading to more clicking
  3. You are taken to a screen where you have to provide a login and password to unsubscribe
    like I remember my login and password
  4. You are told it will take 7-10 days to process your unsubscribing request, and continue to get daily emails until then
  5. You receive an email reporting you will no longer receive emails