Unsubscribe links have to have your identifier in them so you know who to unsubscribe when you click the link.
We used to ask people for their email address to unsubscribe them, but then they accused us of using a dark pattern to keep them subscribed. So letting people unsubscribe easier with fewer hoops to jump through seems like the lesser of two evils.
We used to ask people for their email address to unsubscribe them, but then they accused us of using a dark pattern to keep them subscribed. So letting people unsubscribe easier with fewer hoops to jump through seems like the lesser of two evils.