No one-click unsubscribe? It's spam. 14 years ago
The whole point is, if you make it harder to unsubscribe, people will mark you as spam, think you're even more annoying than other not-wanted mailings and even more unlikely to do business with. Compare it with a store attendee who pulls you in and doesn't let you out anymore.. You will NEVER shop there anymore even if they have stuff you like.