Just FYI, this is illegal under the CANSPAM act (yes, it's a real thing). And, from what I've heard, companies do get in trouble for it. I also know that most major mail providers, like google and microsoft, check messages for unsubscribe links and will aggressively mark mail as spam if you report it (it affects everyone when you flag it). And, most of these companies use a third party mail service for email campaigns, who will also aggressively shut down clients that respect CANSPAM as they could get in trouble for sending it. Would be a shame if people reported them to all of these systems.