Unsubscribe isn’t for spam. It’s for when your stupid bank sends stupid marketing emails to you, but they’re your bank and you can’t just block them, so you politely ask them to stop. There’s laws (the CAN-SPAM act) that say they have to honor your unsubscribe request and stop sending you non-transactional emails (with a few other exceptions.) Ditto the dealership you bought your car from, that online shop you used that one time, etc.
I typically report companies that violate this (Chase, I’m looking at you with your “transactional” emails that are just thinly veiled ads) to the FCC (there’s an online report form) but I don’t know how much it helps.
You use unsubscribe for anyone with which you have some sort of prior relationship. Anything else is spam, report it and move on.
I have been subscribed to so many marketing "newsletters" without my express consent, either by a deliberately confusing registration processes that successfully tried to sidecar the newsletter upon registration using some combination of checkboxes, or straight up silently added out of nowhere just because we had a business transaction once. This is spam as far as I'm concerned since it's unsolicited marketing, but often still honors List-Unsubscribe standards.
Sometimes it's understandable that someone wants to simply filter these mails as spam than go through whatever convoluted process they have in mind for unsubscribe. It's easier and discourages the practice of signing people up to random newsletters.
I typically report companies that violate this (Chase, I’m looking at you with your “transactional” emails that are just thinly veiled ads) to the FCC (there’s an online report form) but I don’t know how much it helps.
You use unsubscribe for anyone with which you have some sort of prior relationship. Anything else is spam, report it and move on.