Unsubscribe link from their emails takes you to this. You then to need to sign in with email and password (I don't know my password) to manage preference. I just want all out!
I've seen many a clutched pearl at the suggestion of doing this.
Fuckin, if it's a problem for me to treat emails I don't want like that, then they need to stop sending so goddamn many. I get maybe 5 emails a week in actually looking for, and that's extremely generous. 5 a month would be just as believable.