I'm inclined to think requiring the login is an intentional choice in most cases rather than an oversight; it raises a barrier to unsubscribing, and can even ma

I'm inclined to think requiring the login is an intentional choice in most cases rather than an oversight; it raises a barrier to unsubscribing, and can even make it impossible, if you never set up an account in the first place. It's sort of like saying you can unsubscribe if you like, without actually providing the option; it offers plausible deniability. I just click on "Spam" and, if it continues, set up a filter to /dev/null.