I wonder if this is compliant with CAN-SPAM, let alone GDPR. Would like to see a web unsubscribe option added, though overall I'm not too upset about it.
It’s not. Providing an unsubscribe link is one of the main points of the act. On Wikipedia is the first point listed.
It doesn't fall under CAN-SPAM. This is a "transactional or relationship message".
Yeah, anyone can think of their emails as "relationship message". The point is that I don't want your relationship emails either, especially if I'm no longer actually using the service.
The problem is that this is junk messaging that no one reads nor needs.